The two cartridges are very similar in a lot of aspects. The sectional density of bullet B is going to be slightly higher than bullet A. And while that is nice, the make or break for hunting cartridges is the stopping power. There is still a part missing to this story though, especially for those in the hunting realm. We gathered the data in the same manner as the short range trajectory, except with the zero range set at 200 yards and graphed the bullet loss (inches) out to the 700-yard mark (Graph 6). Not long ago, Hornadyannounced its 6mm Creedmoor, spawn of the 6.5 that’s zoomed to stardom faster than the .270 did nigh a century ago. We don’t think you are going to be taking a lot of 300+ yard shots with these cartridges but if you do think you will, the 6mm CM rounds are a bit flatter, but both cartridges are manageable. That’s a pretty simple way of illustrating that concept, but we think it gets the idea across. The 6mm Creedmoor often uses longer, more aerodynamically stable bullets which is what adds to the slight increase in the overall length of the cartridge compared to the .243 Win. vs. .300 Win. For muzzle velocities, the .243 rounds have an average of 3,322 fps, two light weight bullets included, while the 6mm Creedmoor rounds have an average muzzle velocity of 3,073 fps. The rim diameter is the usual .473". Too much velocity with an incorrect twist rate or a certain bullet design and you can get an unstable flight with leads to inaccuracy. So naturally, we had to take a look at the long-range trajectories of these two cartridges to see how they stack up against each other. The 6mm CM had two rounds greater than .5 while none of the .243 rounds cracked the .4 mark. A lot of this difference has to do with the bullet design used by the 6mm Creedmoor which makes them more aerodynamic. They have incredibly light recoil which is advantageous when you are going to be shooting a lot. Especially given how it’s trajectory looked, it could be a unique hunting cartridge. Hornady introduced 6mm Creedmoor factory ammo loaded with match and hunting bullets in early 2017. It is lightweight with very little recoil, so it’s fun to shoot all day with little fatigue. The following ammunition cartridge ballistics information and chart can be used to approximately compare .22-250 Remington vs .243 Winchester ammo rounds. For home defense, you don’t need the same amount of momentum. Most hunters/marksmen want a flat shooting round. Bullet C is 200grains with a diameter of .2” while bullet B is 150grains with a diameter of .2”. Because of that, we will strictly focus on energy that is accompanied with the bullet and will be transferred to the target, the amount of penetration you will get on the target and the momentum of the bullet which also plays a role in penetration. ), and.240 Weatherby. That’s always the issue with grouping data, and we don’t discount it, but when trying to relay consistent data for a cartridge comparison, who do we trust? The trajectory is one of the most discussed ballistic properties when it comes to discussing the performance between different rounds as well as between two different cartridges. In this section, we will examine our rounds and look at the kinetic energy they carry along a flight path from the muzzle to 500 yards. The .243 Win rounds show an average of 1554, 1008, and 616 ft.lb of energy. With the increased interest in tactical and long-range shooting, the 6mm rounds have become quite popular though they have been in circulation for some time. It’s beyond us to try and describe it, but if you’re reading this article, it will interest you. First, virtually all bolt-action hunting rifles are available in .243, and there are also AR-10 variants as well (though they won't handle really long, high BC bullets if that matters to you.) It’s a look at an old but trusted and proven cartridge in the .243 Win and a look at a new 6mm Creedmoor cartridge where the results have yet to come in on if it is here to stay or will eventually fall back into obscurity. The popularity of 6mm cartridges has waxed and waned over the decades, but appears to be peaking again. If we take out the two lightweight .243 rounds, we see a little over a 100 fps advantage for the 6mm Creedmoor rounds out to the 200-yard mark with the advantage slowly increasing to around 250 fps at the 500-yard mark. The 6mm rounds have an average bullet drop of 11,” and the .243 Win rounds have an average of 11.6″. We take the stance that none of these categories are great for determining stopping power when isolated. From 500 to 700 yards, we do start to see the 6mm Creedmoor rounds separate themselves from the rest of the pack regarding flatness. 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. 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. Perhaps the biggest obstacle in the way is just availability at this moment. To determine the powder charge, we used Nosler load data and went conservative with the grain weight since we are dealing with factory loads. The 6mm battle is the same as the 6.5 battle between the 260, Creedmoor, and Lapua variants. There are some cheaper .243 rounds out there, but the higher end hunting and match .243 Win ammo is similar in price to the 6mm Creedmoor ammunition and sometimes a little more expensive. 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? There are good reasons why the .243 remains at the top of the heap; it is nothing more and nothing less than the .308 Winchester necked down to hold .243-inch diameter bullets. Even in the hands of a capable marksman, the groupings can change from day to day whether it was due to different environmental conditions or if he/she just had a baby up all night crying. 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. Maybe after looking at the data, we can see if the 6mm Creedmoor might bring something extra to the table. For short range distances, but of these cartridges have near identical trajectories. Like all of the other categories we have looked at, the lightweight .243 rounds tend to throw off the comparison slightly when looking at averages, but we like having them to show the versatility of the .243 Win cartridge. For the 6mm Creedmoor, we like the Hornady ELD-X Precision Hunter 103gr round. This cartridge is new to the shooting world, but it has been winning target competitions and bringing down animals at a high rate since its inception. This difference is even more noticeable at the 500+ yard range when we take out the lighter .243 rounds and just look at the .243 and 6mm rounds of similar bullet weights. 223 Win Super Short Magnum (WSSM) Load Data; 6mm PPC-USA Load Data; 6mm Creedmoor Load Data; 6mm Bench Rest Remington Load Data; 243 Winchester Load Data; 6mm Remington Load Data; 243 Win Super Short Magnum (WSSM) Load Data; 240 Weatherby Magnum Load Data; 250-3000 Savage Load Data; 257 Roberts Load Data; 257 Roberts Ackley Improved Load Data Neck down the 6.5 Creedmoor case for 0.243-inch bullets and you have the 6mm Creedmoor. 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. All of these categories including the categories outside of ballistics all go hand in hand and influence each other. They are slightly different in weight and in their BC, but it was the closest two we could get. If you grew up chasing game on the plains or western mountain area, where long-range shots pop up more frequently, then the BC might have been more of a topic of conversation. Instead of arguing for one specific method of identifying a bullet’s stopping power and attempting to draw conclusions, we are going to take a look at all of them. Its case holds 50 grains of water, compared to 54 grains of water for the .243 Winchester and 47 grains for the 6mm Lapua. These .243 Win rounds tend to lose velocity at a higher rate than the 6mm Creedmoor rounds. From the muzzle out to 200 yards, the .243 rounds have about 100 fps more velocity than the 6mm Creedmoor rounds. The .243 Win. If we look at the 6mm Creedmoor and .243 Win rounds of similar bullet weights, we still see an advantage in the BC’s of the 6mm rounds. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, bullet weight, o The sectional density alone does not provide a clear indication of how much penetration the bullet will have. The .243 WSSM. Interestingly, with some more samples, we see the .243 Win rounds outperform the 6mm Creedmoor in bullet velocity from the muzzle to 200 yards by 250 and 150 fps respectively. Long range, the 6mm CM does show a better trajectory than the heavier .243 rounds. If the area this mass is concentrated is smaller (smaller caliber) than the bullet will penetrate deeper because it is encountering less surface area of resistance. We don’t have any concerns with that. If you want a 6mm rifle that will serve you both in the deer stand and for precision shooting, perhaps the 6mm Creedmoor is for you after all; the factory loading are increasing each year—you’ll find loads from Hornady, Federal, Barnes, Remington and even the new Sierra loaded ammunition—and I think availability and selection won’t be an issue. Below are the averages for the 6mm Creedmoor vs the .243 Win when we include the extra fifteen rounds for the .243 cartridge. With both of thee cartridges taking a .243 caliber bullet the difference is going to depend on the bullet weight. Oct. 15th 2010: I broke a decapping pin during development of the 95g Partition load and purchased another decapping/Tapered Expander assembly that is one thousandth of an inch larger in diameter. You might be wondering how it is tough, just shoot and compare. The velocity of the bullet plays a critical role in several other performance categories. BONUS OFFER: Get your 500 Page Ammo Comparison Handbook (worth $43) for FREE right into your inbox. We get that there are not a lot of factory loaded options out there, but that shouldn’t detract from the 6mm Creedmoor Hornady Match ELD 108gr’s performance. The 6mm Creedmoor has apparently arrived. It can get pretty heated, but that’s just the passion this sport brings out and most of the time it’s all in good fun. 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? Muzzle velocity, when the bullet is paired with the right barrel twist, stabilizes a bullets flight path. This cartridge provides incredible trajectories with only 3″ of bullet drop at 200 yards. When comparing two cartridges that are often used in the hunting world, we like to look at short range trajectories with the optics sited in at 100 yards. There wouldn’t be many more 6mm hunting cartridges added to the lineup until the 21st century; Remington’s 6BR, and the 6mm PPC certainly made a splash in the target world; the .240 Weatherby is certainly a speed demon, and Winchester added the .243 WSSM to the short/stubby lineup. So, we have generated the recoil energies from these two cartridges using an online ballistics calculator (Graph 1). On the other hand, the .243 rounds, other than the 58 and 55gr rounds, fall to the 115-135 inch range. Mag.• .30-06 Springfield vs. .270 Winchester• 6.5 Creedmoor vs. 7mm-08 Remington• 8x57 Mauser vs. .318 Westley Richards• .358 Winchester vs. .350 Remington Magnum• .22-250 Remington vs. .220 Swift• .270 Winchester vs. .270 WSM• .26 Nosler vs. 6.5-300 Weatherby Magnum• .458 Win. It’s also important to recall how the 6mm Creedmoor rounds showed the trend of maintaining velocity, which also led to better trajectory, once you got out to the 300+ ranges. Even 400 yards they can still bring them down with the proper shot placement. If you’re looking to choose between one of these cartridges, it’s going to be a wash when it comes to recoil. While the mass is being focused on the same area for both bullets, the greater weight of bullet C should drive the bullet deeper. The two .261 SD CM rounds also have slightly heavier bullets than the .243 rounds by about 3-8 grains. This is another comparison that matches an established short action cartridge (the.243 Winchester) against a more specialized new short action cartridge (the 6mm Creedmoor) of similar performance. Go to any shooting forum or just some hunting buddies, and you will quickly see who everyone trusts; themselves. Huston is a hunting enthusiast who believes your success in the field is directly correlated to the amount of preparation at home. For their sized game such as coyotes or other varmints, they carry enough energy at any point in their range. We can switch it up with different bullet mass as well. Like all of our cartridge comparisons, we want to step back and take an unbiased look at these two cartridges. Snow has found this extends brass life, as well as giving more room in the shortened case. At the 500 yard mark, the 6mm CM rounds show an average of 2.5″ less bullet drop and this gap widens at the 600 and 700-yard mark with an average difference of 7.3 inches and 15.8 inches. When it comes to this type of data, we don’t have any concern with comparing cartridges, but you should be aware that these numbers can change when being fired from your rifle. This is all from just going off numbers which is only half the story. 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. We see a small to medium game cartridge that has been tested and proven countless times over decades in the hunting world and a cartridge that appears to be able to fill the same niche but just doesn’t have the resume as of yet to make any firm conclusions. A lot of different variables go into calculating a bullets BC but it, along with velocity, are big factors in the how the bullets trajectory and wind drift behave. While we do see the .243 Win round showing a flatter trajectory, we also have to remember that there is a weight difference between the two rounds. The .243 and the 6mm Remington are excellent cartridges when it comes to accuracy and efficiency in hunting rifles, but the hunter who wants the ultimate in 6mm chambering, with factory ammo available should definitely consider the .240 Weatherby. Of the three, the H&H never really had a chance here in the U.S., and the .244 Remington was introduced with a twist rate that prevented it from using the heavier 100- and 105-grain bullets that the .243 Win. The 6mm Rem. And that doesn’t mean they aren’t great rounds for what they are designed to do, kill varmints. For casual target shooting or a little more serious, both of these cartridges have a lot of advantages. The .243 Win has been in use for decades and has a wide base that uses it for a lot of hunting purposes. There is a fine line with the velocity of the bullet. The WSSM is out of the question for a do it yourself build. Again, the 6mm Creedmoor rounds tend to conserve a lot of their flight and performance characteristics downrange compared to the .243 Win rounds. No other environmental variables were used. You'll have to contact Dtech or Oly Arms for a complete upper. At this particular moment, you don’t have many options when it comes to factory loads. At these ranges, the trajectory is not the issue as much as stopping power, which we will look at shortly. The 6mm CM is basically a necked down version of the 6.5 Creedmoor. Win 243 stole a good hunk of the market with a better twist rate to stabilize heavier bullets and Remington after realising their error corrected the twist rate and released 6mm Rem. There are several rounds of both the .243 and 6mm CM rounds that carry very similar momentum numbers. The 6mm bore diameter has long been relied upon for double duty, serving the deer hunter and varmint/predator hunter equally well. There is match grade .243 ammo out there that will pick up the BC closer to these 6mm Creedmoor levels, and it’s a completely different ball game when we start handloading. While all of these rounds will not be graphed and discussed, the averages will back up that our selected rounds still give an accurate reading of how the two cartridges are similar and different from each other. The 6mm Creedmoor was introduced specifically for these shooting applications. At the muzzle, all of the rounds group pretty tightly together barring the 55gr Nosler .243 round, but we do see the 6mm Creedmoor rounds group a little higher. Read the article, .243 (aka 6mm) is a STANDARD caliber size. That’s not to say there are not .243 rounds with better BCs, but they usually hang in that .25-.45 area. There are some key differences between the two modern cases. Receive our newsletter with the best articles covering guides, guns & gear. Looking for previous installments of our "Head to Head" series? was designed for. The 6mm Creedmoor came to light as a wildcat, but not in the traditional way. The 243 WIN and 6MM CM shoot the same diameter bullet .244" and the 6MM CM gets a slight edge over the 243 WIN . Over the past decade the 6.5 Creedmoor has become among the most popular long range shooting cartridges available. For the .243, we are big advocates of the Federal Vital-Shok Nosler Ballistic Tip 95gr. by Philip Massaro - The zero range was set at 100 yards and the data points carried out to 300 yards (Graph 5). In the hands of a capable reloader the 6mm Rem will always have an edge on the 243. We hope that articles such as this one help you take a more broad look at how two cartridges compare to one another. 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. Let’s take a look at the averages when we incorporate some more .243 factory rounds that are available. Mag.• .243 Winchester vs. 6mm Remington• 7x57mm Mauser vs. 7mm-08 Remington• .25-06 Remington vs. .257 Weatherby Magnum• .338 Winchester vs. .375 H&H Magnum• .30-30 Winchester vs. .35 Remington• .257 Roberts vs. .250-3000 Savage• .270 Winchester vs. .280 Remington• .35 Whelen vs. 9.3x62mm Mauser• .416 Rigby vs. .416 Remington Magnum• .308 Winchester vs. .30-06 Springfield• .22 Nosler vs. .224 Valkyrie• .300 Win. It’s an even smaller margin if we don’t take the lightweight varmint rounds of the .243. So, you can imagine that it’s going to be a lot easier to come by .243 Win rounds and you are going to have a lot more options. Past the 300 yard mark, we saw the 6mm CM rounds start to distinguish themselves with 200 to 300 more fps on average. [6mm vs .243 Barrel Life Table ] Velocity -- Rounds per Accuracy Barrel life 3700 + -- 800 Rounds 3400 to 3700 -- 1200 Rounds 3200 to 3400 -- 1600 Rounds 2850 to 3200 -- + 2000 Rounds below 2850 -- + 2500 Rounds [These would be my estimations for Match type accuracy] - - - mikecr writes: I know it's an opposing view, but I gotta give it. Long story short, John built a couple of rifles for the project, with the help of George Gardner of G.A. 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). We like to look at the trajectory at these ranges because it is most often the distance hunters in most applications sight in their optics. We calculated the sectional densities for all of our selected rounds and graphed them below (Graph 8). Inside of that, it exceeds the general guidelines for bullet energy for whitetail sized game. Let’s take a look at the averages when we have a larger sample size of .243 Win rounds. The 6mm Creedmoor, on the other hand, is a much newer and more tailored to a smaller niche in the shooting community and a niche that already has a lot of cartridges flooding the field for the fastest and flattest load. If you look anywhere on the internet concerning cartridge comparisons and especially how they compare to stopping power, you are going to find some pretty heated arguments on which bullet characteristic best equates to the amount of stopping power. The future of the 6mm Creedmoor is still up in the air. Once you get out to the 500+ yard range, there is a very noticeable advantage over similar weight .243 rounds. Recoil really comes into play when we are talking about more recoil sensitive people such as inexperienced users. Dense woods for whitetails with shots averaging around 100 yards and you probably don’t care at all what the BC of your round is. The velocity and BC both affect the trajectory of the bullet as does gravity and wind resistance. For the long-range trajectory, the 6mm Creedmoor shines. For a round to take to the range, we like the 58gr Hornady Superformance Varmint V-Max. The light .243 cartridges are much flatter and give the .243 around a half inch advantage of the 6mm Creedmoor rounds. As far as comparing the two cartridges go, computer generated data has its advantages in that these small differences are negated. Since we are discussing two rounds that are popular for target shooting and one of them being hailed by some as the next great match cartridge, we should probably look into how they compare in their BC’s. It maintains velocity very well and shoots incredibly flat. Get the American Hunter Insider newsletter for at-a-glance access to industry news, gear, gun reviews, videos and more—delivered directly to your Inbox. The reason is the smaller diameter. If we take a look at the numbers for these rounds, we see that there is not a trend for one cartridge having higher recoil than the other. Low recoil, a bullet drop of fewer than 100 inches at 700 yards, high-velocity retention, and a BC of 0.536 all make this a great round to take to the range. 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 from our enlarged sample size for the .243 Win rounds. The ELD-X are great controlled expansion bullets that can penetrate and pass off a large percentage of its kinetic energy. As a general rule, you want at a minimum of 1,000 ft.lb force when trying to take down game around the whitetail size range, and more around the 1,500 to 2,000ft,lb range when talking about bear, elk, and moose, but you don’t usually go after that size game with these cartridges. 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