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Long Range Hunting & Shooting
6.5-284 vs 270 win
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<blockquote data-quote="liltank" data-source="post: 447456" data-attributes="member: 13275"><p>I read an article on Ackley Improved rounds. There is a limitation to the rounds that really benefit from that process. I know that it helps with case life because it reduces the amount of stretch you get in the shoulder area and neck. It does increase volume from 10 up to 30 percent case capacity depending on caliber. The process reduces the angle of the shoulder and the slope in taper of the case. New cartridges really don't benefit from this process because the shoulders are already between 35 and 40 degrees which is traditionally an Ackley shoulder. </p><p></p><p>However older cartridges like the Weatherby Mags, H&H Mags, and 08 parent case cartridges really benefit from this process. The only ones that really don't is the 308 (Which some have had increase performance in varying degrees) due to the caliber size and lack of shoulder space to improve the cartridge. I truly believe the 270Win would also benefit as much if not more than the 280AI due to its smaller caliber. The 22-250 and 243 benefit greatly because both cases utilize a severe taper in body length. With proper loading and use of the newer powders, a 270 Win could essentially be a proper short magnum (not necessarily equal) in an 06 casing. </p><p></p><p>There is an Ohhhh Awwww factor yes, but some are very practical in their application. Try and explain to a guy that has won National championships and successful to and well beyond 1000yrds with an Ackley improved round that it is pointless. When it comes to target applications, speed is king in order to best eliminate the factor of wind deflection. There are cartridges essentially being evolved from the old school method of P.O. Ackley's design. In closing I do agree it is not for every cartridge, but the older the caliber, the more likely it will improve its performance from 50 to 200 fps by this process. </p><p></p><p>Tank</p></blockquote><p></p>
[QUOTE="liltank, post: 447456, member: 13275"] I read an article on Ackley Improved rounds. There is a limitation to the rounds that really benefit from that process. I know that it helps with case life because it reduces the amount of stretch you get in the shoulder area and neck. It does increase volume from 10 up to 30 percent case capacity depending on caliber. The process reduces the angle of the shoulder and the slope in taper of the case. New cartridges really don't benefit from this process because the shoulders are already between 35 and 40 degrees which is traditionally an Ackley shoulder. However older cartridges like the Weatherby Mags, H&H Mags, and 08 parent case cartridges really benefit from this process. The only ones that really don't is the 308 (Which some have had increase performance in varying degrees) due to the caliber size and lack of shoulder space to improve the cartridge. I truly believe the 270Win would also benefit as much if not more than the 280AI due to its smaller caliber. The 22-250 and 243 benefit greatly because both cases utilize a severe taper in body length. With proper loading and use of the newer powders, a 270 Win could essentially be a proper short magnum (not necessarily equal) in an 06 casing. There is an Ohhhh Awwww factor yes, but some are very practical in their application. Try and explain to a guy that has won National championships and successful to and well beyond 1000yrds with an Ackley improved round that it is pointless. When it comes to target applications, speed is king in order to best eliminate the factor of wind deflection. There are cartridges essentially being evolved from the old school method of P.O. Ackley's design. In closing I do agree it is not for every cartridge, but the older the caliber, the more likely it will improve its performance from 50 to 200 fps by this process. Tank [/QUOTE]
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