The lightweight .243 rounds have significantly less bullet momentum than the other rounds which we would expect given that mass is a component of momentum. Ballistically, it is also high grade. Let’s be honest with ourselves for a moment, most of us can deal with recoil, it’s no big deal, but isn’t shooting much easier when dealing with lighter recoil? We will look at both the short range and long range trajectories for these two cartridges given that the .243 is used very heavily in hunting smaller to medium sized game at shorter distances (300 yards and closer) and both are used for long range target shooting. To give you some more depth and widen the selection size, we have compiled the data for an additional fifteen rounds for the .243 Win cartridge and will list the averages for these rounds in several categories. But, I also believe the popularity of the .243 Winchester cannot be rivaled, and that the slight advantage that the 6mm Remington may offer isn’t enough to unseat the .243 in any way. was designed for. We will take a look at the long-range trajectories shortly. These .243 Win rounds tend to lose velocity at a higher rate than the 6mm Creedmoor rounds. If we look at hunting, the low recoil again is an advantage. Loading at 2900fps vs. 3200fps to extend barrel life is nonsense. From 500 to 700 yards, we do start to see the 6mm Creedmoor rounds separate themselves from the rest of the pack regarding flatness. Obviously a lot of things will determine throat erosion/barrel life. Higher velocities increase penetration as does highly bonded bullets that will not fragment on impact. Go to any shooting forum or just some hunting buddies, and you will quickly see who everyone trusts; themselves. In this case, bullet C will have a higher sectional density due to its increased mass. The 6mm rounds have an average bullet drop of 11,” and the .243 Win rounds have an average of 11.6″. The 6.5 will have better barrel life in the 2500-3000fps range and the .243 is usually under 2000 but even there it's not a huge difference. More importantly, this round maintains the velocities to cause sufficient penetration and expansion, and it carries more than enough stopping power out to 300 yards which is excellent for a .243 hunting round at this weight. Without much momentum, you might only get a shallow wound which might drop the animal, but it could mean a long day of tracking. And that’s not to say it hasn’t been used in the field, it’s just not to a point where its performance has broken into the public domain. Another trend that we see in this graph is the rate that the bullets from each cartridge bleed velocity. The velocity as well as the design of the bullet factor in as well. They do differ in their case lengths, with the .243 having a slightly longer casing. With the velocity and BCs, that’s enough in our mind to lean a little towards the 6mm CM for long range shooting and putting the bullet on target. With a cartridge overall length of 2.71 inches, it fits perfectly in a short-action receiver; the parent .308 Winchester defines the standard short-action receiver length. The 6mm Creedmoor—in the same fashion of its larger counterpart—fits those bullets very well. With the stability in the velocity department and the high BCs, we weren’t surprised at the trajectory data. Of course, depending on what you’re doing with these rounds, the flat trajectory might not make up for what they lack in stopping power. In this next section, we are going to take a look at several categories that all fall under the ballistic specs. .243 vs .243AI vs 6mm Rem barrel life? When hunting larger game, you often need your round to be able to penetrate through thick skin and tissue to reach vital organs. At least when looking at the averages. We do have to be cautious when making inferences about these two cartridges from the above numbers because of the novelty of the 6mm Creedmoor case. Even 400 yards they can still bring them down with the proper shot placement. And receive our newsletter with the best articles covering guides, guns & gear. So, we have generated the recoil energies from these two cartridges using an online ballistics calculator (Graph 1). A hunter who has a good .243 will be able to handle the deer species, including mule deer, as there are a good number of premium bullets available in both factory loaded and component form. The issue is that there are not any 6mm Creedmoor rounds in that size for comparison. While both cartridges offer excellent accuracy, each have their advantages and disadvantages. While the latter two designs are viable hunting cartridges, neither of them really challenged the .243 Winchester’s position at the top. While the .243 has a rich history in the hunting world and is often a young sportsman’s first centerfire rifle, the 6mm Creedmoor has yet to break into that world. We take the stance that none of these categories are great for determining stopping power when isolated. Below are the averages from our enlarged sample size for the .243 Win rounds. I am going to be shooting a lot more of the 308 Winchester this year, and I kind of touch on it in the latest podcast. It does not have any SAAMI ratings and a lot of “wildcat variants” are still out there which makes getting the hard numbers on the casing specs difficult. The light .243 cartridges are much flatter and give the .243 around a half inch advantage of the 6mm Creedmoor rounds. This cartridge provides incredible trajectories with only 3″ of bullet drop at 200 yards. That is longer barrel life. The rounds from both cartridges tend to hang around the 8.5-12 ft.lb energy range. I have a Remington with a factory 5R barrel and is has been exceptional. Privacy Policy   •   Contact Us   •   Warnings   •   FAQs   •  © 2020 National Rifle Association of America, Remington Model 700 American Hunter Rifle Project, Women On Target® Instructional Shooting Clinics, Volunteer At The Great American Outdoor Show, Marion P. Hammer Women Of Distinction Award, Women's Wildlife Management / Conservation Scholarship, National Youth Shooting Sports Ambassadors, NRA Outstanding Achievement Youth Award Presented by Brownells, National Youth Shooting Sports Cooperative Program, .358 Winchester vs. .350 Remington Magnum, .25-06 Remington vs. .257 Weatherby Magnum, Large Mountain Lion Spotted Outside Dallas, Head to Head: .308 Winchester vs. .30-06 Springfield, Head to Head: .444 Marlin vs. .45-70 Government, 2020 National Rifle Association of America. As we said, it’s also important in how that speed affects other components of a bullets flight and reaction on impact. Regarding availability, there is no doubt that you are going to run across a lot more .243 Win cartridges than you will 6mm Creedmoor rounds when it comes to factory loads. For factory loads, both of these cartridges are excellent choices for target shooting. Sniper Country is reader-supported. A 243 Win is around 2,000 rounds (+-500). The 6mm Creedmoor vs .243 is a very interesting comparison. Like we mentioned earlier, there are some more 6mm Creedmoor factory loads coming onto the scene this year, but you’re still really limited if you aren’t hand loading. However, the SAAMI maximum average pressure for the 6mm is 62,000 psi and 60,000 psi for the.243, the reason 6mm Creedmoor data … How much longer, hard to say,. The Rem has a slightly higher velocity typically. There are some key differences between the two modern cases. Accuracy is always a tough topic to broach when trying to compare two different cartridges. We can switch it up with different bullet mass as well. When you buy through links on our site, we may earn an affiliate commission. 100- to 115-grain bullets, which the .243 case has trouble fitting in a short-action magazine. Still not too shabby, but steeper than the 6mm Creedmoor rounds. If we look at the averages of the six rounds of similar bullet weights, the difference is .03 inches in favor of the 6mm Creedmoor rounds. I agree that between the cheaper bullets of the 243 and the longer barrel life of the CM, it's a wash or very close to equal. The reason is the smaller diameter. The 6mm CM had two rounds greater than .5 while none of the .243 rounds cracked the .4 mark. I totally get why this 6mm ARC will take the shooting world by storm. However, having been with us since 1955, the .243 Winchester is a very effective hunting cartridge, especially inside of 500 yards, and when used on game animals of suitable size and build. Below are the averages for the 6mm Creedmoor vs the .243 Win when we include the extra fifteen rounds for the .243 cartridge. When we take those two rounds out, the averages are almost identical between the 6mm Creedmoor and .243 Win rounds. At this particular moment, you don’t have many options when it comes to factory loads. There are just so many variables that we think it would be a disservice to you to try and present these two cartridges that way. Recoil really comes into play when we are talking about more recoil sensitive people such as inexperienced users. It’s a good way to compare cartridges, but when actually looking for rounds to use, you will need to pay more attention to the individual characteristics. There is not as much to go on regarding its performance, but that’s part of the intrigue of this 6mm cartridge; what is its full potential? We did this to take a step back before everything gets crowded to look at how the trajectories match up to each other (Graph 4). The vast majority of factory loads for the .243 are more oriented towards hunting. Mag. We will be sure to update this article as more information comes out. FWIW we got about 2,000 rounds on our last 6 Creed barrel, at 1800 rounds it was still shooting 1/3 MOA 5-shot groups at 300 yards. Not only for other ballistic properties but also in terminal performance on impact of the target. It maintains velocity very well and shoots incredibly flat. The heavier .243 rounds and the 6mm CM rounds all carry over 1,000 ft.lb of energy at 300 yards which when placed well, is more than enough for whitetail sized game. Either way, all of the heavier rounds only showed between 9.6 to 12 inches of bullet drop at 300 yards, which is more than manageable. Sectional density plays a role in momentum as more momentum is conserved when the projectile, a bullet in our case, is striking a smaller area. It brings a lot of energy to the table with over 1,000 ft.lb even at 500 yards. 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