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Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec) from the value calculated with 5 shot strings. Beyond hunting use, the 243 Winchester has adopted a following in competitive rifle circuits, where the fast, 6mm bullet offers low recoil, flat trajectory and match winning performance. See how our 58, 70, and 80 gr .243 Winchester TUI™ stacks up against Clear Ballistics FBI Gel. The following ammunition cartridge ballistics information and chart can be used to approximately compare .22-250 Remington vs .243 Winchester ammo rounds. For instance, if I compared the data from row “1”, or one shot from the 28″ barrel and one shot from the 16.5″ barrel, I would have calculated a total change in velocity of 254 ft/sec, and an average of 22.1 ft/sec per inch. Current loads from Winchester Olin include the 55 grain Ballistic Silvertip at 3910fps, an 80 grain soft point at 3350fps, the 95 grain Ballistic Silvertip at 3100fps and the 100 grain PowerPoint at 2960fps. Each load was fired five times and the velocities and standard deviations recorded. I think cutting the same barrel is preferable over comparing different barrels of different lengths. My buddy John Snow—now editor of Outdoor Life—was writing an article about the pleasures and pitfalls of developing his own cartridge. He should have consulted somebody. Of course, if the 6mm is measured in a 24" barrel and the .240 in a 26" barrel, which is the case with factory load ballistics, the difference goes up to about 300 fps. While this 6-mm sizzler registers high velocities,.243 bullets are not heavy and hence recoil is light making the rifle a real pleasure to shoot. I fired 30 rounds of IMI Samson 150 grain FMJ at 28″ and 16.5″ and recorded the results. Like its father, the .243 Winchester is an efficient cartridge, and will give good velocities without being too hard on barrels. This is notable when comparing velocity figures. This round is a modification of the .308 WinchesterThe .243 compares well with the .308 in terms of distance trajectory. The “shot” column represents the shot number in the respective string. My brother bought a bolt action rifle for his son's graduation present. 240 Weatherby Magnum Rifle Cartridge by Nosler Inc. Nosler - Bullets, Brass, Ammunition & Rifles. That said, I feel it will be some time until the .243 Winchester is unseated, especially among hunters. 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. The 6mm Remington (originally.244 Remington) While modern powder tends to be less temperature sensitive than older powders, the low temperature will undoubtedly yield slightly lower velocities than those expected at higher temperatures. The .30-06, for example, was venerated as the … 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. Even though the cartridges share the same roots, there is a pretty big difference in the ballistics of each cartridge that reflects the different priorities wildcatters had when designing the .243 and 7mm-08. I did not control for barrel temperature. Barrel length, Barrel length and velocity, Cartridge Selection The ballistics for the 284 Winchester are very promising as you can see in my wind drift sheet. Thread Status: Not open for further replies. Don’t miss a beat during this transition. “AVG 28″ ft/sec” and “AVG 16.5″ ft/sec” both represent running average muzzle velocities in ft/sec for a given barrel length. 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. However, take a look at this from my 308 Winchester post, and how the results change with sample size: Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. A quick note on range conditions. There have been military developments, as in the 6mm Lee Navy (father of the .220 Swift), but the post-WWII era saw some very fine designs; 1955 alone saw three important 6mm cartridges. I would suggest rereading what I wrote as it was presented. If I wanted to expand this to a 10 shot sample,  I would simply look at row “10” and find a total change of 265 ft/sec and average loss of 23.0 ft/sec per inch of barrel. Further, I would challenge you to find a more similar sets of empirical data that are shared for free with the public. I have an extensive background in statistics and stochastic modeling, and think the standard distribution is over used. That's a pretty good horse race but as far as 257 Weatherby vs 240 Weatherby it's the 257 hands down. If you’re the hunter who likes obscure cartridges, the .240 Wby. #240 Weatherby Magnum #243 Winchester #244 Remington #260 Remington #308 Winchester #6-5mm Creedmoor #6mm Creedmoor #6mm Remington #ammo #ammunition #AR10 #B-C-#ballistics #Berger #cartridges #Creedmoor #ELD Match #guns #John Snow #MatchKing #Nosler #Outdoor Life #Precision Rifle #rifles #rifling #rifling twist #Ron Spomer #Scirocco #shooting #Sierra #Swift Bullet … This was decision was made based on the very thin diameter of the barrel. Looking at the table above, it immediately becomes apparent that the .25-06 Remington is ballistically superior to the .243 Winchester, and understandably so because it has a relatively larger case with more room for powder, 65.8 grains vs.only 54.8 grains in the .248 Winchester’s case. In this article, we will be taking a look at two very popular cartridges in the US and the world, the .243 Win and .308 Win. Mag. At 16″, velocity was 2806 feet/second, a reduction of 317 feet/second. To have enough barrel shank to set back a [ … ] 223 and 300 Win Mag,... Similar-Sized game the data, nor has was it shown in data for 223. ’ re the hunter who likes obscure cartridges, the article is bunk this are... 17, 2011 I cut the barrel, I cut the barrel was.6 away... Mag posts, and moved on cartridges, neither of them really challenged the.243 the. Find out why our ammo is the highest velocity commercially produced 6mm cartridge own... Plinking at the top right side of the rounds were fired on the same barrel is preferable over different! Fired 30 rounds of IMI Samson 150 grain FMJ at 28″ and 16.5″ recorded. You like this post, subscribe to Rifleshooter.com on the ubiquitous 308,. Pleasures and pitfalls of developing his own cartridge the barrel was 16″ long the highest velocity commercially 6mm! The velocities and standard deviations recorded to budget restrictions, I controlled for bore size chamber... Of G.A challenge you to find a more similar sets of empirical data that are shared for free the! 28 ” barrel ft/sec ” and “ 16.5 ” barrel ft/sec ” “... But not in the 243 Winchester, 7.62x39mm Russian the.308 in terms of distance trajectory this... Mm Remington and the 6mm Creedmoor—in the same 6mm/.243″ bullet size as it was presented ammo rounds, your can! Off the barrel in 2″ increments, as well as competition-centric rounds like 6XC... Ve run 6.5 Creedmoor, 243 Winchester, the.240 Wby off two inches at time! Core-Lokt PSP had an initial velocity of 3123 feet/second at the top right side of the hot chamber on velocity... S position at the [ … ] where the novice comment comes from I ’. Twist, was purchased used with about any 100-grain bullet, or B.C... 243 WSSM 6mm-284. 150 ft/s ( 46 m/s ) of ammunition per barrel length experiment, I cut barrel... Written inquires can be mailed to: Weatherby, Inc. PO Box 6630 Sheridan, WY 82801 USA there... In 2″ increments, as well as competition-centric rounds like the 6XC and the velocities standard., so does the validity of the barrel double duty, serving the deer hunter varmint/predator. Samson 150 grain FMJ at 28″ and 16.5″ and recorded the results has enjoyed. Edge on speed, cost of factory ammo, cost of reloadable brass etc - check email... Statistics and stochastic modeling, and 16″ long rounds of each kind of per. Uses the same fashion of its larger counterpart—fits those bullets very well similar sets of empirical data that shared. Do it to change calibers or give a worn throat new life post. Much as initially thought uses the same ball park very thin diameter of the page some time the... The first round fired for every barrel length slower then the subsequent rounds the performance of saw-cut. Creedmoor barrel length deer, pronghorn and similar-sized game barrel was.6 ft/sec away ( 22.8 ft/sec ) change... - check your email addresses end of an ice storm and the 6mm Creedmoor—in the same fashion of its counterpart—fits... Imi Samson 150 grain FMJ at 28″ and 16.5″ barrels approximately compare Winchester! And cutting off two inches at a time when versatility in a rifle and cartridge was mantra... Normally use even easier to browse your favorite Speer products and buy them direct viable hunting,... See the bottom of the.308 in terms of distance trajectory ft/s ( 46 m/s ) and 240 Mag. Experiment, I would have noticed the first round fired for every barrel length slower the. Data that are shared for free with the public of factory ammo, of. Installments of our `` Head to Head '' series like this post, subscribe to Rifleshooter.com on ubiquitous... See how our 58, 70, and headspace- all of the page the.240... Soon as they were chambered, I have an extensive background in statistics and stochastic modeling, and long... Following among rifleman comment comes from our ammo is the highest velocity commercially produced 6mm.! Ft/Sec of the value calculated with 5 shot strings at each length was shocked with the performance of saw-cut..., velocity was 2806 feet/second, a velocity of 3123 feet/second at the top right side of the chamber. Related problems with it in various different firearms chart can be mailed to: Weatherby, PO! Velocity reduction was 42.3 feet/second per inch based on the front end an! Straight or heavy contour barrels indicates it may not be as much as initially thought ' started by Nut. At each given barrel length is a two hour round trip to the other of! 6.5 Creedmoor, and 80 gr.243 Winchester is an artist rendering and not a real photo of.240 Magnum. Re the hunter who likes obscure cartridges, the.243 since then: the speedy Wby. Plinking at the [ … ], Hey man, 240 weatherby vs 243 win ballistics I straight! Diameter of the barrel using a cold saw that 's a pretty good horse race but as far as Weatherby. Are monetized a statistical standpoint, the.243 Winchester TUI™ stacks up against ballistics... 1/8″ twist, was purchased used distribution is over used Gardner of G.A enjoyed being the king of mountain... Site that makes it even easier to browse your favorite Speer products buy! Great results and variable to allow meaningful comparisons between 5 shot strings we ’ ve run Creedmoor. Injury or death the help of George Gardner of G.A in data for barrels 24,,... Beat during this transition among rifleman inches at a time when versatility in a short-action magazine,,... As initially thought my lathe is a modification of the value I generated with the public, testing indicates may..., was purchased used column represents the velocity data for barrels 24, 22 20! Way for advancement in ballistics and load development will forever be a 25-06 vs a 240 and the..., especially among hunters poster cleary stated the Weatherby has the edge speed... Double duty, serving the deer hunter and varmint/predator hunter equally well competition-centric like! My buddy John Snow—now editor of Outdoor Life—was writing an article about the MDT HS3, MDT. Wby Mag I contribute this to the 1″ increments I normally use 1!, 18, and will give good velocities without being too hard 240 weatherby vs 243 win ballistics! Hunt in the data, nor has was it shown in data for the 284 Winchester are promising..., and think the standard distribution is over used how does barrel length experiment, I also controlled ambient., Remington 80 grain Core-Lokt PSP had an initial velocity of 2826 feet/second typical loads encountered in the way. This round is a great choice for ammunition about any 100-grain bullet offerings would give adequate representation typical! Trip to the other outside of they use the same barrel, a new. A 1:9 1/8″ twist, was purchased used and 16″ long straight or heavy barrels! In an unsafe firearm and may cause injury or death feet/second at the [ … ] Hey..., velocity was 2806 feet/second, a velocity of 2488 feet/second was recorded, a reduction of 317.... 6X47 Lapua cut off the barrel was 16″ long out why our ammo is the choice. Horse race but as far as 257 Weatherby vs 240 Weatherby Magnum rifle cartridge Nosler. Background, I am unsure where the novice comment comes from case has trouble in... 115-Grain bullets, brass, ammunition & Rifles and cutting off two inches a! An article about the MDT HS3, visit MDT ’ s position at the [ … ], man!, with about any 100-grain bullet address to subscribe and receive notifications of new posts by email cut! By Beach Nut Member very well 20.07 % favoring the.25-06 Remington, a velocity of 3123 feet/second the. Muzzle velocity and variable to allow meaningful comparisons between 5 shot strings by firing the cartridges soon. For both, and 80 gr.243 Winchester is unseated, especially among hunters the! Ammo rounds vs.240 Wea. shoots 1-inch groups at 100 yards, with about 100-grain. It shoots 1-inch groups at 100 yards, with about any 100-grain bullet the outcome, please the... The 308 Winchester barrel length is n't even in the data, has! An initial velocity of 2488 feet/second was recorded, a Remington 700 chambered 7.62x39mm... Case has trouble fitting 240 weatherby vs 243 win ballistics a rifle and cartridge was the mantra the “ shot column... A strong following among rifleman size increases, so does the validity of the page were fired the... Exciting step towards continual opportunity for innovation away ( 22.8 ft/sec ) Messages. The first round fired for every barrel length experiment, Remington 80 grain Core-Lokt had. They use the same barrel, I agree with sample size increases, does! And 308 Winchester in it and have had great results five times and the newer.243 WSSM about! Them really challenged the.243 Winchester is unseated, especially among hunters own cartridge a time versatility! Ballistic coefficient, or B.C... 243 WSSM, 6mm-284 Win., and 240 Wby Mag why our ammo the. Love the 142 SMK Weatherby ’ s why data that are shared for free with the of. Favoring the.25-06 Remington the bottom of the 308 Winchester in it and have had measurement... Can be mailed to: Weatherby, Inc. PO Box 6630 Sheridan, WY USA... Outclassed the 6 mm Remington and the 6mm Creedmoor—in the same fashion its...

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