This round impresses the hell out of me. The .260 Remington sparked quite the interest in the North American market of the 6.5mm cartridges. Yes, we know some barrels last longer than 3000 rounds. Then, of course, you have to consider other factors such as powder type, pressure, velocity, bullet weight, and barrel hardness. *Note the high round count estimate for 5.56x45mm. We have asked several of the top rimfire shooters and gunsmiths that use our barrels about their procedures and based on our own experience, have come up with our recommendation for cleaning. Rule of thumb: 30-50 fps for every inch of barrel either gained or lost. 1,000m: 1,451 ft-lbs 1,500m: 722 ft-lbs. I think the 6.5 Grendel does a great job at that, however, as to be expected, the Grendel is limited in range and does not fit into the 800m+ world. You cannot pick a better round for the beginner Long Range shooter. It would stand up in the alcohol suspension and cling to the barrel when passed through on a patch. If you are looking for exceptional, hard-hitting, flat performance, you might want to consider the .300 PRC. I heavily recommend this caliber to those out there who want magnum performance without magnum recoil. The components for reloading are also readily available. Do your homework. Due to the popularity of the cartridge, 6.5CM ammo can be found almost anywhere. The .300 WSM steals the performance of a .300 WM and transforms down to a short-action rifle. The .308 is no different. For someone considering PRS matches, this rifle is not for you. The 308 guys will sing the praises of long barrel life and the high pressure, flat shooting 6 and 6.5 caliber guys with talk about how much they enjoy their ballistics. History: While the 6.5mm (0.264) projectile was incredibly popular in Europe, the US in the late â90s was still stuck on the .30 caliber range. And varmint-type accuracy should be quite a bit longer than this. Muzzle Velocity: 168gr Berger Target Hybrid @ 3,200 fps, Ballistic Co-Efficient: G1: 0.515 G7: 0.264. Ballistic Co-Efficient: 140gr ELD Match G1: 0.646 G7: 0.315, Remaining Energy: Muzzle: 2,401 ft-lbs 500m: 1,301 ft-lbs 1,000m: 633 ft-lbs 1,500m: 325 ft-lbs. It makes sense. Hot .224 caliber-type cartridges will not do as well, and 1000-2500 rounds is to be expected. With a muzzle brake and/or suppressor, the .300WM can feel similar to a .308 Winchester. Handloading ammunition can reap the reward of selecting the exact projectile with the exact desired BC. This use has saved us in time at the bench and bullets in the backstop. Our rifles were dinged, we sometimes were issued machine gun ammo instead of match. The 6.5 Grendel comes to us in 2003 from Alexander Arms. Initial Thoughts: Just like any new and exciting caliber that is designed specifically for the LR community, I know the performance will be top-notch. Defining “Overbore” Cartridges via Comparative Index, What is an “Overbore” Cartridge? Ballistic Co-Efficient: For optimum LR performance, the 108 ELD Match projectile; G1: 0.515, G7: 0.268. Most off the shelf set-ups are going to be on the high end of the market so the 6mm CM is not ideal for a beginner shooter. Few AR-10âs exist that can fire the .300WM. Barrel life is controversial, and subjective. I do believe the market will catch up to this round. Still less than the classic .308 Winchester. In our AccurateShooter Forum, there has been a thread discussing whether the 6.5x47L or 6mmBR is better for the 600-yard game. John’s system, while not perfect, does give us a benchmark to compare various cartridge designs. The cartridge was designed for reliable feeding in battle rifles, not efficient powder burns for consistent accuracy. G7 is the most current and most accurate measurement of the predicted flight of a long range projectile. If a bullet flies at 3000 fps, it will pass through a 24″ (two-foot) barrel in 1/1500th of a second. Over 100 ft-lbs difference! In the hands of NBRSA long-range Hall of Famer Don Nielson, the 6.5x47L has won two NBRSA 600-yard Nationals convincingly. The big advantage and why the .260 became so popular was that it could easily be necked up or down by using other standard rifle cartridges, making reloading a breeze. For a rifle platform, this caliber is great for building a highly modular and dynamic set-up. He started off with two, identical, match-grade HV taper stainless barrels. That corresponds pretty well to what we’d expect for a 6BR — about 2500 rounds. Remaining Energy: Muzzle: 2402 ft-lbs. I retired this barrel after that match because it had started to copper-foul quite a bit. We have in our shop one our drop-in Anschutz barrels that has 200,000 rounds through it and the shooter, a competitive small-bore shooter reported that it had just quit shooting. Itâs not the fastest, farthest, or most accurate roundâ¦but it will certainly get the job done with less headache and wallet-ache. I shot this out of the new Barrett ASR at 1,600m. This website is not affiliated with the United States Marine Corps, and the information on this website does not necessarily reflect the opinions of the Marine Corps as a whole. Initial Thoughts: This caliber excites me for several reasons. However, the majority of builds will be designed for the bolt action system. This is a really important factor to consider amongst a myriad of choices. Somewhere in-between an AR-15 and AR-10. The truth is that there is no one best long range caliber for every job and there are many factors to consider. Many don’t consider the cost of brass, as it is reloaded several times. Initial Thoughts. When thinking of muzzle velocity, a faster round is not always better. Ammo Availability: Again, being one of the forefathers of the Long Range shooting community, .308 is found everywhere. With help from the civilian market led by Winchester, the .308 took the world by storm. Cross-Platform Use: In the future, maybe the âOver .30 Cal Clubâ will find some traction in the AR- world. Insights from Dan Lilja". The 6.5 has even made its way into the SOCOM sniper community. This is especially important to those of you who reload and can tailor a custom load for you rifle. Most .243 rifles are chambered in older, wooden sporting stocks like the Winchester Model 70 and older Remington 700âs. Both SOCOM (Special Operations Command) and the US Army has selected the .300 Norma Magnum as their hottest and newest sniper rifle cartridge. His favorite caliber at the time for LR competition shooting was the 6.5CM. Iâm referring to cartridges that have been custom designed by people in the industry who squeeze every drop of performance out of a round. If your barrel loses accuracy at the 1500-round mark, then it only worked for three seconds! Sniper teams were already comfortable with the way a 308 performed. To take the 6.5CM and add MV to the equation, pure joy happens. However, most off the shelf Long Range rifle manufacturers are chambering their flagship rifles in 6.5 Creedmoor (and for less than $1,200). I think the 6.5 Grendel does a great job at that, however, as to be expected, the Grendel is limited in range and does not fit into the 800m+ world. ADVERTISEMENT. John notes that there is no generally accepted definition of “overbore”. Not to mention guys that still compete with and collect old military surplus riflesâ¦I see the .30-06 sticking around for a good while longer. Your bullet starts at zero velocity and then accelerates as it passes through the bore, so the projectile’s average velocity is not the same as the 3000 fps muzzle velocity. Very modular across nearly any rifle system. Now when it comes to ammo, I already mentioned wildcat cartridges. But everyone knows, the faster you shoot, the worse the barrel life. Since its inception, the .308 has remained the most popular choice of Long Range shooters, snipers, and hunters. This one is good for everything from sniper rifles to semi-automatic machine guns. Either way it is flexible for your mission. No. Its use today is limited to medium to big-game hunting; bolt action only. Recoil Condition: Very similar to the .243 Winchester. Is the 6.5×47 Lapua the Next, Great Do-It-All Cartridge? It offers exceptional accuracy and a decent range for shooters who do not have Long Range facilities available. Put the two together and you have a great shooting LR round. The US military decided that the average rifle squad was more effective by accurately delivering rounds on target with a 5.56mm rifle than the heavier recoiling 7.62 platforms. If, for example, you’re trying to decide between a 6.5-284 and a 260 Remington, it makes sense to compare the “Overbore Index” number for both cartridges. Recoil Condition: With more case volume than a .308 and firing the same grain weight bullet, the .30-06 will have more felt recoil than a .308. Today, this cartridge is in use globally by military/LE personnel, hunters, and LR shooting enthusiasts. Save your money and invest in training and supplemental gear. Now that we are pushing a 140gr projectile up to nearly 3,000 fps, the recoil will slightly increase over the 6.5 Creedmoor. The new case was developed for years based on the T65 developmental cartridge. As said before, the standard rifle manufacturers have not caught up the .224 Valkyrie. Average barrel life will be 1,500-2,000 rounds. I still think this cartridge might be a bit on the wildcat side of the market (expensive to shoot and a barrel burner). They start with double stress-relieved 416R stainless steel, a pre-hardened chromium stainless steel ideally suited for use in precision, match-grade rifle barrels. One big drawback to the Valkyrie is the same as the .223. Muzzle: 2,240 ft-lbs 500m: 1,091 ft-lbs 1,000m: 457 ft-lbs 1,500m: 221 ft-lbs. Dan looks at factors that affect barrel longevity, and provides some predictions for barrel life, based on caliber, chambering, and intended use. The lighter 140gr range projectiles donât enact enough felt energy rearward like the 175gr+ class of projectiles from bigger bores. It offers exceptional accuracy and a decent range for shooters who do not have Long Range facilities available. www.Momentive.com, Sales Contact: Robert Bell He wanted an even lighter-recoiling cartridge with the same performance, so the 6mm Creedmoor was born. The ammo was considerably lighter, meaning the rifles could be lighter. A BC number can be represented in several different, values or standards. We all have scores of 5.56 mags laying aroundâ¦why not beef up that system? Each shooter knows his skill level, practice needs, and shooting discipline’s requirements. It can certainly put shooters on notice that some chamberings (such as the 6-284) are likely to be a barrel burners. Unless you will be loading subsonic rounds, all standard Long Range rifle calibers maintain supersonic flight (Mach 1 or greater than 1125 fps). At the moment, the 6BR and BRX/Dasher variants look like they may be getting to the same point in 300 to 600-yard BR type competition. As for PRS shooters, with great flat trajectories and low-recoil, follow up shots are a breeze. The .300 Norma Magnum comes to us from the .338 Norma Magnum, necked down to accept a .30 cal projectile. If I was building a rifle on this caliber, I would expect to look at bolt-only options. Of course our analysis does give you even more of an excuse to buy a nice new Bartlein, Krieger, Shilen etc. If you are in serious contention to win a major competition, then losing even a single point to inferior ballistic performance could cost you a national title or record. HBN is very slippery and it goes on clear, so it doesn’t leave a dirty mess on your hands or loading bench. MVâs range from 2,500 fps (130gr projectile) to 2,880 fps (90gr projectile). The .224 Valkyrie was the child of an experiment by Federal in 2017 to reach into the 1,000 yard competition circuit (which was dominated by the .30 caliber class cartridges) with a small .22 caliber projectile. A line can be drawn in the sand between the .30 cal class projectiles and the .338 and larger. Just like any new and exciting caliber that is designed specifically for the LR community, I know the performance will be top-notch. Much sharper and stronger than a .308 Winchesterâ¦not meant for beginners. From what can be expected, the .224 wears a little bit more than the .223, approx. And to the varmint hunter shooting prairie dog-size animals, the difference between a .25 MOA rifle or one that has dropped in accuracy to .5 MOA may not be noticeable in the field. Currently, G1 through G8 and GL is the only mathematical models to express BCâs. Another good aggregate was fired at the 1997 NBRSA Nationals in Phoenix, Arizona during the 200-yard Light Varmint event. Real-world shooting of this round is even more impressive. Top Rifle Barrels. For the hunting world, yes. The .338 Lapua comes to us in the 80âs as an extreme Long-Range rifle caliber intended to extend the snipersâ capabilities in desert and mountainous terrain. However, the 6.5 Lapua and .308 Winchester do share the same bolt face. Remember that predicting barrel life is a complicated, highly variable subject. Muzzle Velocity: 2,700 fps using 140gr projectiles. Ballistic Co-Efficient: Above bullet, G1: 0.539 G7: 0.276. Ballistic Co-Efficient: Using a 168gr SMK, G1: 0.463 G7: 0.224, Remaining Energy: Muzzle: 2,821 ft-lbs. It makes sense. The benchrest shooter and to a lesser extent other target shooters are looking at accurate barrel life only when asking this question. 1,500m: 362 ft-lbs. Prior, only dedicated .338 Lapua Magnum receivers could handle the round. I would argue, these are two of the most important questions to ask/answer when talking about the best Long Range roundâ¦what is the ammo availability like and/or do you reload? With the right rifle, the .300WM can be a very smooth shooting set-up. ... the Best Coyote Caliber of Them All. The downfall? Translation: More skill per dollar! You may see something like this: 6.5mm 140 grain VLD G1 BC: 0.593 G7 BC: 0.304. Itâs also a great option for those interested in close to medium range varmint hunting. As a serious LR shooter who intends on needing terminal performance or wanting a modern tactical build, I would leave the .243 behind in the 20th century where it belongs. A cartridge burning less powder will last longer or increasing the bore size for a given powder volume helps too. In your opinion is the 6.5 Creedmoor going to eventually put out to pasture the 30-06 and the .308? Overall Practicality: Unless you are a military sniper, this round has almost zero practicality. 500m: 2,364 ft-lbs. No. Overall Practicality: Incredible mid to long range performance. Still, the spreadsheet is very helpful. Bartlein uses some of the most advanced computer-aided manufacturing processes available. })(); To comment on a post, click Post Title or "Comment" Link. With the projectile variability and network of knowledge on this cartridge, I think itâs a great option to build a classic hunting rifle. Our barrels clean just as clean as with WS2. Because this cartridge is so new, ammo prices are going to be high. Mike cautions that predicting barrel life involves so many different factors (including how hot the barrel is run), that the task is a bit like predicting tread life on car tires. Again for the best LR option, 140gr Hybrid Target MV: 2,780 fps, Using above projectile, G1: 0.607 G7: 0.311. For myself, I have up to 800 meters to shoot at a private location, so grabbing a .338 Lapua Magnum with a max effective range well over 1600m makes no sense. Overall Practicality: All in all, if you are new to the LR community and have an heirloom .243 in the family and that is it, re-barrel it and work on fundamentals. Ammo Availability: .243 Winchester is still a viable option for most East Coast White Tails and Mid-West Prairie Dogs. Overbore Cases and Accuracy Surprisingly due to the case volume to bore area ratio, barrel life is impressive for a cartridge of this size. Some shooters might ask themselves if they could meet their present needs with a more economical caliber. Remaining Energy: Muzzle: 1316 ft-lbs 500m: 470 ft-lbs 1000m: 165 ft-lbs 1500m: 108 ft-lbs, Recoil Condition: One of the great things of a .223 rifle build is that the recoil is manageable of a shooter of any age. This round is special just like the other 6.5mm projectiles in its class. Recoil Condition: Very similar to the Lapua Magnum. The 6.5 PRC was born at the 2018 SHOT Show. Editor’s Comment: Mike’s spreadsheet is a helpful tool, but it is NOT a definitive “take-it-to-the-bank” indicator of barrel life. 500m: 2,115 ft-lbs 1,000m: 937 ft-lbs. The Verdict: If you put a gun to my head, the 6.5mm Creedmoor is the best, overall, Long Range caliber.
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