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. We will be sure to update this article as more information comes out. We also saw a pretty significant difference in the ballistic coefficients of these rounds. 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. We used the same sight height for all the rounds and used the bullet weight, muzzle velocity, and ballistic coefficient to generate the data. You'll have to contact Dtech or Oly Arms for a complete upper. The Rem has a slightly higher velocity typically. The 6mm Creedmoor is just one of several new cartridges developed to try to improve on the older 6mm rounds and cater to a rapidly growing field of marksmen. For home defense, you don’t need the same amount of momentum. When we talk about trajectory, we are only referring to elevation and how much a bullet will drop as it moves downrange. It’s all good if you have a fast, flat shooting bullet that can cut through wind but does it have the necessary power to get the job done on impact of the target? It’s got an old school vs new punk type feel to it. For that, they still have plenty of bullet energy. On impact, this kinetic energy is transferred to the target where it causes damage to surrounding tissue and organs. 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. While there are flatter and steeper rounds for the .243 Win, just looking between cartridges we do not see a significant difference in bullet drop within 300 yards of these two cartridges. There are some key differences between the two modern cases. One way to determine the amount of penetration two cartridges will have is to compare the sectional density (SD) of the bullets used. 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. The same trend happens at the 300-yard mark. It’s significantly lighter for both cartridges compared to other centerfire rifles often seen used for medium sized game. And of course, we just don’t have the opportunity to include more 6mm CM rounds at this time, but hopefully, soon we will have this list expanded. We see a similar trend when looking at the smaller sample size of the .243 Win rounds compared to our four 6mm CM rounds. We don’t have any concerns with that. 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. And their lies the problem with comparing accuracy. Both cartridges can get the job done. For factory loads, both of these cartridges are excellent choices for target shooting. Momentum simply describes the ability of an object in motion to stay in motion. At this particular moment, you don’t have many options when it comes to factory loads. 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. 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 future of the 6mm Creedmoor is still up in the air. There are some talks in the long range community of how the 6.5 Creedmoor perform against the .243. The trends should still hold up. It maintains velocity very well and shoots incredibly flat. The 243 has an edge as far as bullet drop is concern. The .243 Win has been in use for decades and has a wide base that uses it for a lot of hunting purposes. The reason we can use the sectional density as a basis for potential penetration when looking at two cartridges is that the bullet caliber and weight are tied pretty closely to the cartridge design. 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. It’s not quite the same as the actual felt recoil that you feel, but increased recoil energy does correlate with increased felt recoil. We have listed those rounds below. In this cartridge comparison, we are going to take a look at the 6.5 Creedmoor vs .243 Winchester. We will look at the bullet velocity and trajectories over a range and then also examine the ballistic coefficients of these rounds. As we move downrange, we are going to omit the 55 and 58gr .243 Win rounds just because they lose energy as they move downrange. As most of us know, Winchester unleashed its 243 Win. The 6mm Creedmoor has apparently arrived. No other environmental variables were used. With the stability in the velocity department and the high BCs, we weren’t surprised at the trajectory data. Of course, bullet design (including sectional density) and expansion also influence a rounds ability to penetrate. 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. murkydismal, When the 6mm Creedmoor appeared, quite a few people predicted it would have a harder time becoming established than the 6.5 CM, due to the .243 Winchester being such a universally chambered cartridge. The issue is that there are not any 6mm Creedmoor rounds in that size for comparison. 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.) At least when looking at the averages. So, we gathered the short range trajectory data from the manufacturer where available, and also use a ballistic software to generate data as well. With two decades of chasing all manner of upland game, hooved mammals, strutting gobblers, and any small game that can fit in his Dutch oven, he hopes to offer new ideas and viewpoints on hunting and firearm concepts and traditions. Precision, wrote the piece on his necked down 6.5 Creedmoor, and moved on. (originally the.244 Rem. The 6mm CM had two rounds greater than .5 while none of the .243 rounds cracked the .4 mark. A basic review of the rifle you see featured in the majority of my videos. These .243 Win rounds tend to lose velocity at a higher rate than the 6mm Creedmoor rounds. From this comparison, it out performs the .243 in a lot of areas when it comes to target shooting. Handloading, both of them can become competition cartridges as well. 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. 6mm Norma BR 243 Winchester 250 Savage 260 Remington 6.5/284 Norma 7/08 Remington 284 Winchester 300 Savage 308 Winchester 338 Federal 35 Remington 358 Winchester 6 & 6.5 Creedmoor 6.5 Lapua 6XC Short actions with a bolt face .Dia of .540+/-223 WSSM 243 WSSM 25 WSSM 7mm Remington saum 7mm WSM 300 Remington saum, 300 WSM 325 WSM 350 Remington … At this point, the average difference at the 500, 600, and 700 ranges are 7.8, 16, and 28 inches respectively. The two .261 SD CM rounds also have slightly heavier bullets than the .243 rounds by about 3-8 grains. The ballistic coefficient of a round is simply letting you know how well the bullet resists drag and wind drift and thus, the easier it will be to group shots at long range. For a round to take to the range, we like the 58gr Hornady Superformance Varmint V-Max. So we’ll take a stab at accuracy for the sake of argument and a little fun. 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. It’s not the cheapest ammo to go plinking with, but if you are wanting to get into long range shooting but haven’t quite made the jump into handloading, this round is a great place to start. Mag. It brings a lot of energy to the table with over 1,000 ft.lb even at 500 yards. 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. For the long-range trajectory, the 6mm Creedmoor shines. Below are the averages for the 6mm Creedmoor vs the .243 Win when we include the extra fifteen rounds for the .243 cartridge. And it is useful, but we think so much of accuracy relies on pairing the right rifle with the right round and have both of them in experienced and practiced hands. If you’re a numbers guy/gal, take a look at this: 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. It began life several years ago as a wildcat and quickly began to rival its parent in popularity among log-distance competitors. 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. The latest in a rather spare line of 6s that’s grown mainly in the rarified air of Benchrest and Precision Rifle shooting, the new Creedmoor has the profile and ballistic zip of a hunting cartridge. The Nosler Ballistic Tip bullet is one of our favorites for deer sized game. To determine the powder charge, we used Nosler load data and went conservative with the grain weight since we are dealing with factory loads. 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. 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 parent case of the .243 is the other cartridge of discussion in this article, the .308. Once you get out to the 500+ yard range, there is a very noticeable advantage over similar weight .243 rounds. What we are going to look at is the actual energy that is generated from firing these rounds. Like all of our cartridge comparisons, we want to step back and take an unbiased look at these two cartridges. The theory behind sectional density and penetration is that the heavier the bullet, the more mass that is behind it when it hits the target. 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. 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. 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. Hornady 6mm ARC Losing Ground Hornady is claiming its 6mm ARC will yield 2,750 fps with a 108-grain ELD-M bullet from a 24-inch barrel. We will also bring these tables back at the end of the article when we discuss the applications of both these cartridges. I was thinking of buying my 14 year old granddaughter a deer hunting rifle. Receive our newsletter with the best articles covering guides, guns & gear. Now, there are many other factors that go into a bullets ability to drop animals cleanly, such as the bullet design and its ability to cause serious wounds based on how the bullet expands when it reaches the target, but that’s hard to quantify and have any meaning when trying to compare two cartridge types. If you have two cartridges with similar specs, such as the 6mm Creedmoor vs the .243 Win, you can expect to see pretty similar sectional densities. Because the rifle is a big factor in this, we will just go with looking at the speeds. We think that the 6mm Creedmoor vs .243 Winchester is a intriguing comparison. The issue with some of the heavier bullets is the other ballistic performance specs. 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. As the rounds move downrange, we see the rounds group together based on their cartridge type. The trajectories of these cartridges are also more than suitable for hunting. 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. A lot of this difference has to do with the bullet design used by the 6mm Creedmoor which makes them more aerodynamic. Huston is a hunting enthusiast who believes your success in the field is directly correlated to the amount of preparation at home. The light .243 cartridges are much flatter and give the .243 around a half inch advantage of the 6mm Creedmoor rounds. My buddy John Snow—now editor of Outdoor Life—was writing an article about the pleasures and pitfalls of developing his own cartridge. vs. .300 Win. The .243 Win rounds show an average of 1554, 1008, and 616 ft.lb of energy. 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. More often, the BC plays a bigger role in selection for long range shooters and some hunters who might be taking 400-500 yard shots. Before we wrap up the .243 versus 6mm Creedmoor comparisons, we want to take the nine rounds we have looked at and pick a few of our favorites for certain range and hunting scenarios. Accuracy is always a tough topic to broach when trying to compare two different cartridges. That paired with its BC makes it a great cartridge for adverse weather conditions in the field. Not only for other ballistic properties but also in terminal performance on impact of the target. For hunting, it’s also an intriguing round that has a lot of potential. This article lists firearm cartridges which have a bullet caliber between 6 millimetres (0.236 in) and 6.99 millimetres (0.275 in).. Because of this, these numbers might fluctuate a bit in reality, given your rifle and the actual powder charge used by the manufacturer. It’s tough when trying to compare two different rounds of the same cartridge. 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. Commonly encountered match cartridges, left to right: 6mm BR, 243 Winchester, 6×47 Lapua, 6 Creedmoor, 6.5×47 Lapua, 6.5 Creedmoor, 260 Remington, and 308 Winchester. The vast majority of factory loads for the .243 are more oriented towards hunting. The downside to the lightweight rounds is going to be the low BC which is useful when firing at these long ranges where wind really becomes a factor. This flatter trajectory makes it easier to adjust for shots over longer ranges and in theory, should make accuracy and precision more attainable. Too little and you might not get the penetration or expansion you need. Let’s take a look at the averages when we incorporate some more .243 factory rounds that are available. We will also examine the sectional densities and bullet momentum for each round we have selected to represent both cartridges to determine the amount of potential penetration. Too much velocity with an incorrect twist rate or a certain bullet design and you can get an unstable flight with leads to inaccuracy. The word was out, and though the .244’s twist rate was revised just a few years after its introduction and it was renamed the 6mm Remington, the clear advantage that the .243 had and still has is evident in the sales numbers. When you buy through links on our site, we may earn an affiliate commission. The .243 comes in a wide range of bullet sizes and makes it a pretty versatile gun in the hunting world for the type of game it can effectively be used against. 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. We can look at some of the ballistic and other performance data we have already covered to look at accuracy in a roundabout way. Again, the 6mm Creedmoor rounds tend to conserve a lot of their flight and performance characteristics downrange compared to the .243 Win rounds. When hunting larger game, you often need your round to be able to penetrate through thick skin and tissue to reach vital organs. 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 While we are selecting a variety of rounds with a good range of bullet weights and designs, it’s only scratching the surface. Let’s take a look at the bullet momentum data from our selected rounds (Graph 9). What exactly are we looking at when comparing the 6mm Creedmoor and .243 Win cartridges? If you’re looking to choose between one of these cartridges, it’s going to be a wash when it comes to recoil. 6mm Creedmoor in Good Company Similarly, the 6mm Creedmoor compares to the 243 Winchester. Best Concealed Carry Insurance [Comparison Chart]. And you’re right, but does your data really represent what everyone else is going to see shooting from their rifle? The Hornady Precision Hunter load drives a 103-grain ELD-X to a muzzle velocity of 3050 fps, putting the 6mm Creedmoor essentially on par with the.243 Winchester, but it’s the ability to properly seat the longer bullets with the best ballistic coefficients that gives the 6mm Creedmoor the edge out beyond 500 yards. It’s a fine balance between speed and stability. 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. There are quite a few heavier bullet weights out there for factory loaded .243 Win ammo in the 100-110 grain weight range. As we said, it’s also important in how that speed affects other components of a bullets flight and reaction on impact. Snow has found this extends brass life, as well as giving more room in the shortened case. BONUS OFFER: Get your 500 Page Ammo Comparison Handbook (worth $43) for FREE right into your inbox. The 58 and 55gr .243 rounds are extremely flat with only 6 and 7 inches of bullet drop while the remaining rounds fall to the 10 and 11-inch range. We hope that articles such as this one help you take a more broad look at how two cartridges compare to one another. You are welcome to add yours in the comments. There is a lot more to a good hunting and competition rounds, but with limited time and space, our selections for comparison will give you an excellent starting point and base of knowledge to dive even deeper into the discussion. We take the stance that none of these categories are great for determining stopping power when isolated. The old 243 Winchester can beat that by about 300 fps. On the other hand, the .243 rounds, other than the 58 and 55gr rounds, fall to the 115-135 inch range. It is a nearly dead cartridge though so components are harder to come by. We see a cartridge that has been a long-standing favorite for target shooters, and we see a new cartridge that has thrust itself into the same scene and shown incredible potential in its short time. The velocity and BC both affect the trajectory of the bullet as does gravity and wind resistance. Especially given how it’s trajectory looked, it could be a unique hunting cartridge. We can still see that both have pretty impressive trajectories for factory rounds though they are on the lighter side for both of these cartridge types. This sub-category is going to cater more towards those looking for a hunting cartridge, but if you’re going to buy a rifle chambered for one of these cartridges, then there is no harm in understanding as much as you can about each. 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. 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