You could even use 6.5mm brass, it would simply take more work to neck down. Not trying to start a war on the very interesting .22 thread. As a 450 yard deer cartridge. This is a distinct step up in performance. I loaded up 200 rounds with fireformed 22-250 Lapua brass and 45.5 grains of R26. If you want just 1 rifle the 243 has the ability to be a MPBR/old school varmiter right slong with the 22/250, but a much better Deer?antelope rifle. However, the big question for hunting, is if the small diameter bullets have the energy needed to make clean kills. The old standard would have dropped a rainbow-like curve of 12.6 mils at the 1000-yard mark. Coated bullet benefits are hotly debated, so research this one thoroughly and proceed with caution if you decide to do so. After the initial hype of the 6.5mm Creedmoor cartridge, it seems to have kept growing commercially in popularity, with 6.5 Creedmoor chambered factory rifles available from most of the large manufacturers and loaded ammo in this caliber readily available on most shelves in the US. Considerably less powder, longer barrel life, slightly less recoil, and I bet it will be easier to tune. Required fields are marked *. While barrel life many not be financially concerning for many shooters around the world, it is still good to understand roughly how long your barrel may last until precision starts to decline. .22-250. I am having the action trued up and will be bedding it into either a Savage laminate stock or an H-S Precision composite stock. Just as they were done, Loki, disguised as a fly, bit Sindri on the elbow causing all 6.5 barrels forged to wear out at 4000 rounds but be extremely accurate energy at a recoil velocity of 12 fps. While some think that energy is not the all-important factor and cite archery and sub-sonic hog hunting as an example; really cant argue that either. Even "shot-out" barrels in an infamous barrel burner like the 220 Swift are usually in excellent condition at the cooler muzzle end. For what this is worth, my load above shoots great with Hornady brass but as with most tinkers I wanted to try some loads using small rifle primers. The first rounds I loaded were made by necking down readily available 6mm CM cases before 22 Creedmoor head-stamped brass was available. A word of caution though, at the speeds delivered by the 75, 80 or 90gr bullets in this cartridge, combined with the expansion ability of ballistic tipped bullets, you should rather aim for head shots to prevent meat damage when hunting deer or other animals for meat, and not at all when hunting for trophies, we have seen this same 75gr bullet that cleanly took down the Zebra above, also remove the top half of a Impalas head on another occasion. That means the lands on my 6mm Creedmoor eroded 0.077" over 1300 rounds, which is an average of 0.0059" every 100 rounds (i.e. After hundreds of comments, phone calls, and mess. Mason? -Craddock Precision, That this Barrel is Custom Made to Order, If the Blank is in stock it will get turned soon, 6-8 month lead times are to be expected, if Blanks are not in, we then strive to ship your Barrel as soon as we can! 0.077" is a relatively small distance. the SRMP is your baby!! These five variables are as follows: Throat erosion is often the main determining factor of a rifle barrels life. Tried some new powders, I was very cautious on this lot and will be bumping the charge up after this batch. It sounds to me like your pissing on the .308, something MANY snipers would disagree with as well. This left the straight neck-down of the rather vanilla 22-243win the most appealing option for those wanting more 22calperformance than a straight 22-250 would offer. The Kimber K6 Deep Cover The Snubnose for Today. Allow extra time for your barrel to cool between shots, and avoid rapid or sustained fire where possible. It should now be apparent that there is no easy answer to how many rounds a rifle barrel can fire before accuracy declines; there are simply too many variables involved. This is known as a barrel log. Here is a brief summary of the cartridge. I can not speak to the virtures of Alpha brass, but I haven't heard any complaints about their other offerings. As your barrel starts to reach the end of its accurate lifespan, you may notice that bullet seating depth gradually increases, while group sizes enlarge and precision degrades. Your email address will not be published. Barrel life, according to most precision shooters is basically the number of rounds expected before the rifle shows inaccuracy of more than one MOA. What is does excel at though, and arguably better than any other cartridge ever made, is for taking down coyotes and other varmint. This may continue until eventually the rifling is not longer able to stabilise the bullet, and you will notice sideways impacts of the bullet on targets at all distances, even those placed not far from the muzzle. Self Defence & Tactical Rifle Operators , Snipers & Long Range Rifle Enthusiasts , 2023 Dark Earth Tactical. IN something like this with such a short barrel life.I am of the opinion that once I find a load that works, I stick with it. Cm case has greater volume, so 250 ammo should not pose a pressure concern. How ever those were heavy barrels on the rifles, I mainly now have sporter barrels on all I have with the exception of the Ruger American Predators, I have Three, there barrels are a bit heavier then the sports as Im sure you all ready know. I just decided to build a 22-250. This data may of course vary in reality (depending on a wide range of variables), but it will give you a good indication of which cartridges to stay away from if you plan on spending excessive amounts of time at the range, and are concerned over your barrels lifespan. Reviewer Jeff Cramblit built a 22 Creedmoor rifle and tested it with a variety of bullet weights. Using Hornady 6 creedmoor necked down at the moment. We would even recommend it above 6mm competition calibers in precision shooting matches under 800 yards other than PRS matches with their 3,200 fps limit. I kept the barrel short to run a suppressor. It may not display this or other websites correctly. There has even been confirmed coyote kills out to over 1000 yards with with the 75gr ELD-Match bullet. I know that huge advances in rifles has taken place since the 1970s. The choice will depend on the individual user and the quality of Alpha brass. It is my feeling that Alpha Munitions OCD 22 Creedmoor is the best presently available. There are a number of things that a shooter can do to reduce barrel wear. Hmmm, how long ago did Beanland build your rifle? Compared to the 7.1 mils of the 22 CM its easy to see why the 22 CM has a high hit probability. Mine is throated long, twisted fast and loaded hot but I'm able to sling 95gr SMKs at 3200fps from a 22 inch tube with H4350. The tough northern coyotes we hunt have a reputation for taking some vicious hits and then just getting back up to run off. I built the 22 CM to be a dual-purpose gun, or actually a 3-purpose gun. The accuracy nodes are wide and forgiving, the feeding is boringly reliable, and the performance out in the world has been dominating. This is something that plagued me with the traditional 22-250 and caried over into the 22-243win I ran prior to switching to the 22 Creedmoor. Casing Type:.22 Creedmoor LRP (Large Rifle Primer) Casing Trim Length: 1.910" Primer: Federal Large Rifle Magnum Match (GM215M) Rifle Firearm Used: Horizon Firearms .22 Creedmoor Barrel Length: 24" Rate-of-Twist: 1 in 8" Casing Manufacturer: Peterson Cartridge Co. Casing Type:.22 Creedmoor LRP (Large Rifle Primer) Casing Trim Length: 1.910" I learned a few things from it, in the Marine Corps we kept barrel logs for our M40A1s. Find the perfect load for your rifle and shoot accurately. I know guys that run anything from 22-26" barrels, 1-6.5 to 1-7 is what you'll need for the heaviest bullets. Add to Wish List Add to Compare. hornady spire point. I have personally taken a large Zebra male with a clean headshot with my 22CM shooting a 75gr Hornady ELD-M at 3650 fps, it dropped right on the spot. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. 22 Creedmoor. Accurate barrel life can defined as the point where precision will start to decline. For brass you might look into Alpha Brass. Getting to 22CM from 6CM is a straight forward pass through a FL die. I ordered a 6.5" twist barrel. The 22 Creedmoor or 22CM as some call it, was bound to happen at some point as almost every new caliber or cartridge created, gets necked down to a wildcat with a lighter bullet for more speed at some point in time, however the exact person to first do it is still to be confirmed. Among his training credits include NRA Instructor, AR-15 armorer, FBI Rifle Instructor, and Officer Low Light Survival Instructor. Related Tags: Please double check the 500 yd energy of the 308 168 SMK. A longer barrel generally costs more. Heres my issue or more correctly, just a question. 6548306D-74FF-424F-A172-75F117B1FDBE.jpeg. 6mm Creedmoor Barrel Life. The advent of the 6mm Creedmoor immediately had folks necking the hornady 6mm down to 22 cal and upon doing so found virtually the perfect case capacity for heavy weight .224 bullets. Also I was able to find . Dies, brass are coming out now, powders and GREAT bullets are already here. For a better experience, please enable JavaScript in your browser before proceeding. Jeff is intimately familiar with the shooting industry competitor, instructor, RO, range master, match director. The area of the chamber just forward of the web on the original [], The 6mm BRX vs 6mm BR The 6mm BRX uses 6mm BR brass as the base brass. The heavier bullets being used in the 22 CM range from 75-95 grains. 370. But also dont over-clean your rifle; only clean when necessary. Im running the heavier bullets, typically 88 or 95 grains. Feature Articles, Bipods and Rests . The 22 Creedmoor will come standard with a 1-in-7-inch fast-twist barrel, and combined with the increased volume inside its case, you can push those long pills over at 3,450 feet per second! Watch below as the kill is only thanks to the speed of the 22 Creedmoor, and another split second of air time would have been too long. So check out the details and run the numbers yourself and consider one for your next rifle build. Sad. I have rifles chambered in both 6.5 and 6mm Creedmoor (CM) but the 22 CM has captured my attention. $65.75. That just isn't a thing in Creedmoor land. APR Maverick 22 Creedmoor - Alamo Precision Rifles APR Maverick 22 Creedmoor Sold! The original 6XC chambering was designed based off the usage of 22-250 brass which typically has a web diameter in the range of .461-.463. Im running a 21 Shilen 1-8 twist and I have excellent accuracy with 80gr smk, 80 eld-m and 88gr eld-m bullets. Initially to create brass for 22 Creedmoor cartridges, one would simply neck down high quality 6mm Creedmoor brass with a good full length sizing die and enough case lube, or by fire forming 22-250 brass. No matter the reason why they are developed, but whether or not new cartridges stay and become accepted in the shooting community, depends on the shooters, and if they are requested from rifle builders and manufacturers, and used in competitions or in the field. Cooper Creek, Gunwerks, and Spark Munitions have a variety of offerings depending on what purpose you have for the gun. Patrick's .22 Creedmoor was built by Little Crow Gunworks on a Remington 700 action using a PROOF Research barrel and Stocky's AccuBlock EuroMatch adjustable cheekpiece laminated stock. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Well, contrary to some of the chat here, when I read a review like this, even though comparing various cartridges is common, I think of the new stuff as in addition to my current collection versus instead of. Kinda like my wife does with shoes. Nothing changes..heavy vs super light! Testing the AGM TS19-256, .22 Magnum for Personal Defense Is the Juice Worth the, Ruger Introduces Custom Shop Precision Rifle in 6.5, SafarilandReleases First of its Kind Hard Armor Rifle. Note, I shoot it like I stole it. The fact that gun owners are becoming more advanced than before is another reason we may be seeing so many new cartridges. I tried to find an email for Mr. Cramblit with no luck. That's five shots. 3450-3475fps would seem to be a really excellent place to operate with an 80gr weight class bullet. We frequently get questions about the application of this cartridge and what it's primarily used for. A benchrest shooter will consider a barrel shot-out long before a hunter will. I just wanted to see if I had enough H4350 on hand to burn out my barrel. I've been waiting for it to be in stock, I have some of their 6 Creedmoor brass and it's good stuff. Skip to content. The notable difference is .22 CM rifles are normally equipped with faster rifling twists to stabilize heavier, higher BC bullets. Most shooters first roll their eyes when hearing you say you have a 22 Creedmoor, just hearing the word Creedmoor, but they often do a double take a second or two later and ask, 22?. For the third purpose, hunting deer sized game the 22 CM will certainly shoot far enough flat enough to get accurate hits. And finally, as demonstrated by the example above, shoot less-powerful cartridges. I think I over cooked the cream of wheat. They could be into competition shooting and need a cartridge that will give them a competitive advantage. 2,959. The answer also relies heavily on your goals; a benchrest shooter will consider a barrel shot-out long before a hunter will. 22 Creedmoor is also often mispelled as 22 Creedmoore or Creedmore, it is also often called the 22 6.5 Creedmoor denoting the main 6.5 Creedmoor cartridge that it was developed from. Satterlee Scott. Your observation sounds spot on. Creating a 22 Creedmoor chambered rifle is also fairly simple, you simply use the action of a rifle, or a rifle with a compatible bolt face and action length as can be seen on our bolt face database, and then have a gunsmith chamber and fit a .224 barrel to it. Compare it to Factory ammo available to everyone for the last 50-75 years to see if its even worth the bother to wildcat it. Out of stock. Making the 6mm BRX is easy and involves loading up 6mm BR brass and fire forming it in a 6mm BRX chamber (the fire forming loads can also be very accurate). The 22-250 will have a much shorter barrel life than the 6.5 CM. The energy of the 250 grain 45 caliber bullet at that distance was only 630 ft-lbs. The same brothers that forged Thor's hammer Mjolnir. I have some R26 and R23 that I want to try. When you hit a deer you could hear a loud Thwapp! I'm rough on my barrels but since I can rechamber myself I don't worry too much. The only real issue that remains on the 22 CM rifle is just how long the barrel is going to last. Now we have Alpha Munitions producing factory 22 Creedmoor brass, and the stage is set for a complete takeover of the big 22cal scene. Sep 30, 2004. More importantly, why all the fuss? Once I lock in on the bushing size required to size effectively, I will load up 3 rounds at a hot load and fire them in my chamber. The oldest mention and claim of a rifle chambered in 22 Creedmoor, is a comment made on 24 October 2013 on a SnipersHide post where user KYS claims to have suggested a 223 bullet faster with more reliable feeding and George Gardner of GA Precision and Josh Lapin of Copper Creek Ammo joked about the 22 Creedmoor, and this comment was in response to the post highlighting the image on GA Precisions Facebook page showing a 22 Creedmoor earlier the same day. The first of these wildcats to make it to the big league was the 6mm Creedmoor; now a SAAMI approved cartridge with rifles offered by many manufacturers. Is Cheap Thermal Worth It? Farthest was about 140yds, bullet still passed completely through, exiting through the far shoulder on a quartering away shot. This will assist in understanding why groupings may eventually open up, while also allowing for timeous submission of new license applications in certain countries around the world; take South Africa for example, where a barrel may take up to 1-year to license. Then too there was always the discussion of barrel life, and cases with lots of body taper and shallow shoulder angles tend to tear up throats. Thought I'd post this here since there was discussion of barrel life. Handloading, Do you think 45gr of R26 would be a good starting point? You could achieve better barrel life going with a slower powder especially with the 80 and heavier bullet weights. Im up to 3 pronghorn and a pig with my 223 shooting 70 grain tsx, at reasonable ranges. The need to find a cartridge that performs better under that very particular scenario comes with this niche emphasis. For a sub-MOA barrel, many shooters report a loss in peak accuracy for 28 Nosler around the 800-round mark, while a 6.5 Creedmoor barrel can hold accuracy until around 2,000-2,500 rounds on average. Id tell them that my Dad was a Senator on a military senate sub-committeetheyd believe me. I know several folks including myself have been playing with the 22 creedmoor for a while now. Since individual rifles can vary I dont know whether it was wear or not. It's a cool cartridge for sure. This requires that you have the correct reloading shell holder or case holder as it is sometimes called for each of the calibers that you reload ammunition for, to ensure that you can hold the cases in the reloading press to use them. Now we have Alpha Munitions producing factory 22 Creedmoor brass, and the stage is set for a complete takeover of the big 22cal scene. Not a trace of it. Its a great quality barrel, but the only profile available at the time was far heavier than I would have liked, so in order to keep the overall weight of the gun down I had the gunsmith make it shorter, giving up some velocity to gain mobility afield. I HAVE shot the bbls out a a few older models, which is WHY I went to the 22-250. #3123699 - 01/17/18 12:34 PM Re: 22 Creedmoor [Re: thoms715] CZ527 Die Hard Member III Registered: 12/25/14 Posts . My Rifle isnt Shooting Right: What to do? This varies depending on your rifle, barrel, load, velocity and bullet. H4350 is kind of a "go-to" powder for the Creed case but I have had really good performance and barrel life out of H4831, H1000 and RE23. Ive used the same round on whitetail deer and inside of 100 yards it takes them off their feet and they never know what hit them. The process for making that brass was easy enough, but still, somewhat time-consuming. The 22 Creedmoor's' standard is a 1-in-7/1-8-inch fast-twist barrel, combined with the increased case volume to push long and heavy .22 bullets at over at 3,450 feet per second. All with R26. At our 22 Creedmoor muzzle velocity of 3550fps the Hornady 75gr ELD-M bullets produces around 2099 ft.lbs of energy, taking it close to medium 6mm bullets or light 308 Winchester rounds. Shop Odin Works 22 In. The Springfield Armory Waypoint 2020 rifle is an exceptionally accurate rifle. Everyone has a different take on what they consider acceptable accuracy which will increase or decrease the numbers. For PRS you dont actually need all the speed the 22 CM has to offer from longer barrels. I thought that might be the case just wanted to confirm. There arent really any large scale manufacturers making a 22 Creedmoor Factory Rifle, however, there are somewhat off the shelf 22 Creedmoor rifles available from companies like McWorther custom rifles and GA Precision to name but a few. Just letting you know it was first created by Horizon Firearms out of Texas February of 2014. Part of the beauty of the 22 CM is that it shoots standard .224 caliber bullets that are available almost everywhere for the hand loaders and cost less than larger caliber bullets. So what is accurate barrel life, and how do we determine a barrels life expectancy? A barrel log should be kept for each rifle in your Shooting Record Book, or Field Data Book, and may also be stored on an electronic copy or cloud drive for safekeeping. With proper annealing and die setup, it will no doubt serve you very well! But at the end of the day, a rifle is made to be enjoyed, so dont hold back on shooting your rifle over concerns of losing accuracy, but rather enjoy the rifle and monitor barrel life so that you can prepare for a replacement when one is due. With good bullets, medium sized game can be taken quite easily with some 22 calibers. I have also been shooting a .260 Rem out of a M700 for almost as long. We have checked the reamer records accordingly. The point of this wildcat is to use heavy for caliber bullets, which most if not all of the old 22s cannot do. Fun while it lasted. I have to say, the best part about shooting the Meredith 22 CM is that its just fun to shoot. The now super popular Hornady 6.5 Creedmoor case is no exception to that rule. If you want to run light bullets fast, just build a 20 tactical and run the 32gn v-max at 4100. Taking a quick look at how the 22 CM compares to some other cartridges will shine a light on its potential. So I was reading this article that says barrel life on a 6.5 Creedmoor is about 2500 rounds. Expect to spend $0.95 per round and up [ED: mid 2020 prices now start at about $140 a round]. The last deer I shot I tucked right inside the shoulder blade as he was quartering towards me and it completely destroyed the opposite lung. Even when using the venerable mainstay 52gr SMK at 4100fps from the 22-243, it was not uncommon to have squarely hit coyotes get knocked down and then run off to die 150yds later. Starting with a .260" bushing on the first pass and finishing with a .250" will often work quite well. Ensure correct methods of cleaning and maintenance. I believe it will gain a true following like it's big brothers. Within the shooting industry, there are all kinds of niche markets today. Varget and the faster propellents finding favor with the light weight bullets in the 50gr range while H4350 and H1000 being used with the 75- 80gr class bullets. To put it into context, a credit card is around 0.032" thick, so the amount of erosion we're talking about over the life of a barrel is barely more . Seriously doubt any significant difference. It On coyotes and varmints on the other hand, fire away! But again, that just my opinion. This makes an outstanding round with only 7.1 mils drop at 1000 yards, and 1.7 mils of wind drift for a 10-mph wind at that distance. Here []. 22 Creedmoor Bartlein Barrel Build a 22 Creedmoor Bartlein to fit your needs! Just received my 22 creedmoor reamer and have a 20" Proof Carbon Savage pre-fit in 223 that I'm going to have reamed out and picked up a Savage take off 22-250 barrel to ream and use for fire forming/prairie dogs. So how much bullet energy is needed for medium sized game? This puts it in the .243 Winchester class for punch. The .22-243AI, middlestead, and 22-6 were speed demons to be sure, but there were always crippled due to mag length restrictions or fire forming considerations. This erosion is accelerated when cartridges are loaded hot (adding additional propellant) with the aim of increasing the bullets velocity. Choices are great, Lapua brass with large primers is what made me choose a 22-250 instead of a 22 Creedmoor. When the rifle is fired, the explosive heat and pressure from the propellant gasses begin to erode the throat of the barrels interior surface. It also depends on the ammo, bullet weight / style, powder, and velocities that you're running. Fierce Firearms FCTR22CM24BF CT Rival 22 Creedmoor Caliber with 4+1 Capacity, 24 in Carbon Fiber Barrel, Black Cerakote Metal Finish, & Forest Green Fixed Fierce Tech C3 Stock Right Hand (Full Size) Hinterland #: 174586. This one has my attention. Our hair was long, wed wear cut off Navy dungarees, (jeans), Navy chambray shirts with the sleeves removedwe would shoot enormous amounts of ammunition, we basically looked like 180 degree out of phase squids>>>(sailors). Both of them usually have a 22 Creedmoor for sale and in stock. Laugh! The typical American had just a few all-purpose guns a few decades ago. In order to determine the accurate barrel life of a rifle, we can use a barrel life calculator. The following chart displays accurate barrel life data for a number of popular rifle cartridges. Well I pulled the trigger, pun intended, on the 22 creedmoor. Proof was posted where McWorther custom rifles having already built and chambered on in 2012, so your reamer records were checked incorrectly. starting my build and have decided on this caliber. Showing all 21 results. With a wide selection of bullets and factory brass available, all thats needed is reloading dies to put it all together, and with reloading dies now available from major sources such as RCBS, Hornady, Redding, and Whidden, the 22 CMs seems on the rise. Features: Bolt Action, 6.5 Creedmoor, 22" Fluted Stainless Barrel, SA Radial Brake, Green Co. Springfield Armory 2020 Waypoint - For Sale - New :: Guns.com 3/3/2023 And barrels cost less than new truck tires! Many readers misinterpret our article on barrel life; assuming that were estimating the exact number of rounds until a shot-out barrel. Making brass from 6mm creedmoor is simple and quick. I intend to use 83 gr Hammer or 75 gr Swift bullets. Like most modern cartridges with minimum taper and 30-degree shoulders, the .22 Creedmoor is set up with long throats and fast twist barrels to handle bullets as heavy as 95 grains, pushing them as fast as 3,000 fps. Fill out the form below and we will be in contact with you to get your custom build started. He concluded it worked best as a varminter, but could also do PRS duty, provided it is loaded under the 3200 fps velocity limit common in PRS matches. When did the 30-30 change from a brush gun to a 200 plus yard tack driver?? A highly accurate, easy to shoot rifle with a flat trajectory will make for confident hunting. Heavy bullets are. The 6.5 Creedmoor also has a distinct advantage over the .308 at long ranges where there's little time to make wind decisions. Thankfully though, there are many companies now including Hornady, Peterson, Alpha Munitions and a few more, making 22 Creedmoor brass cases. At 4400, it was toast. . Poor cleaning practices can reduce the life of a barrel by damaging rifling. I believe they will be doing a full production run of 22 Creedmoor in the next 45-60 days if not sooner. This is not true, but rather it is a calculation used to estimate the point at which accuracy will noticeably decline, which may be a steady and slow yet progressive declination if precautionary measures are taken. I dont really care for comparisons based on different caliber rounds. For me, the Varget/69TMK was almost an accident, but its showing good numbers, and superb accuracy. Shooting heavier bullets at more reasonable velocities also calms some barrel-burning qualms. 22 Creedmoor Load Data Since its' inception, in 2007 by Hornady, the 6.5 Creedmoor has seen some pretty meteoric growth in popularity. For this project, my sacrifice was in the barrel. What is my Rifles [Accurate] Barrel Life Expectancy? The primary culprit in a centerfire rifle that affects accuracy is an eroded throat, however the rest of the bore and/or rifling can wear too. The TSXs in my experience have been overperformers, big time. In MY worthless opinion, if you have 5 or 6 REALLY accurate rifles for varmint hunting, and at least a couple for EACH larger animal you hunt..then the same for various target sports..then you really have all the calibers and guns that you will have any USE for. MFG #: FCTR22CM24BF. Winchester Model 70 Super Grade AAAA Maple Walnut - 6.5 Creedmoor - 22" . This item can be shipped to United States. The 22 Creedmoor ballistics, beating out those of the .22-250 and many other fast .224 caliber cartridges, are what is drawing more people towards this cartridge lately. You can also neck 6mm Creedmoor down to 22cal easy enough. Just FYI. There are SAAMI specification available for the 22 Creedmoor parent case, the 6mm Creedmoor, and in turn also the 6mm Creedmoor parent case, the 6.5mm Creedmoor. The general "rule" about barrel life concerns bullet diameter versus the cartridge's shoulder diameter ratio. One of the easiest ways is to select a cartridge load that does not necessarily produce the fastest muzzle velocity, but rather considers barrel life versus effective range and stopping power; settling on a favourable compromise. Well, it seems opinions are mixed, and you know what they say about opinions.
22 creedmoor barrel life