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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.257 Wby --> .25-06 AI
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<blockquote data-quote="Trickymissfit" data-source="post: 461043" data-attributes="member: 25383"><p>.257AI will group better than the .257 mag or the 25-06 due to a better case design alone. But more importantly is that it works just fine with a 24" or a 26" barrel. Cases are 57mm in length, and fit the magazine well much better when using the long VLD bullets so popular on this board. P.O. Ackley says many times over that an improved 57mm case will shoot just as fast a the 30-06 case length. A 25-06AI will go no faster than 3350 fps with a jet pack attached. A .257 mag will go about 3550 fps with a lot more powder. A .257AI will do about 3300 fps as well. Now I too familure with the .257's and the 25-06 and .257 mags, and have chronographed a lot of rounds thru these barrels. Have shot them thru everything from 28" barrels down to 22" barrels. With the exception of the Weatherby and some super slow powders there's just not much speed in there to be gained. Whatkind of chamber pressures are you talking? Bob Hutton claimed to have got 3800 fps with the 100 grain bullet in the 25-06AI, but no one has ever came close to duplicating these speeds. Ackley upfront says 3400fps maybe, but probably 3300 is more realistic. </p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 461043, member: 25383"] .257AI will group better than the .257 mag or the 25-06 due to a better case design alone. But more importantly is that it works just fine with a 24" or a 26" barrel. Cases are 57mm in length, and fit the magazine well much better when using the long VLD bullets so popular on this board. P.O. Ackley says many times over that an improved 57mm case will shoot just as fast a the 30-06 case length. A 25-06AI will go no faster than 3350 fps with a jet pack attached. A .257 mag will go about 3550 fps with a lot more powder. A .257AI will do about 3300 fps as well. Now I too familure with the .257's and the 25-06 and .257 mags, and have chronographed a lot of rounds thru these barrels. Have shot them thru everything from 28" barrels down to 22" barrels. With the exception of the Weatherby and some super slow powders there's just not much speed in there to be gained. Whatkind of chamber pressures are you talking? Bob Hutton claimed to have got 3800 fps with the 100 grain bullet in the 25-06AI, but no one has ever came close to duplicating these speeds. Ackley upfront says 3400fps maybe, but probably 3300 is more realistic. gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.257 Wby --> .25-06 AI
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