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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7 x 57 ai
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<blockquote data-quote="TOM H" data-source="post: 337979" data-attributes="member: 306"><p>DragonsBane, You asked this "Any thoughts on this?" I answer based on 2700fps with 180gr VLD bullet in a 7x57AI with a Shilen 24" barrel. The case capacity measure in water for the 284 is 64.59gr, 7x57 is 55.55gr,7x57AI is 61.44gr. </p><p></p><p>If you look real close at the barrel on that F class 284 that gets 2950fps. The barrel is a 32" Broughton 5C. If that rifle didn't have that extra barrel length and being a 5c maybe high 2700fps. Here a deal from Broughton on the 5c barrels "Shooters are reporting more velocity, great accuracy, longer barrel life, reduced bolt pressure and ease in cleanability with the Broughton "5C ®" barrels. "</p><p></p><p>Base on the fact that Shilen barrels threaded for the mauser are #2/3 contour I assume that you are building a hunting rifle that the reason I said at least 25" long barrel. If problem with the 284 case then go to a 280 case.</p><p></p><p>Ackley data from Speer wildcat manual #4 published 1959 on the 7x57AI put his loading data @ 60Kpsi and that is the data I used in my 7x57AI.</p><p></p><p>Don't get me wrong that I know all the answer you may be right. good luck on your project.</p></blockquote><p></p>
[QUOTE="TOM H, post: 337979, member: 306"] DragonsBane, You asked this "Any thoughts on this?" I answer based on 2700fps with 180gr VLD bullet in a 7x57AI with a Shilen 24" barrel. The case capacity measure in water for the 284 is 64.59gr, 7x57 is 55.55gr,7x57AI is 61.44gr. If you look real close at the barrel on that F class 284 that gets 2950fps. The barrel is a 32" Broughton 5C. If that rifle didn't have that extra barrel length and being a 5c maybe high 2700fps. Here a deal from Broughton on the 5c barrels "Shooters are reporting more velocity, great accuracy, longer barrel life, reduced bolt pressure and ease in cleanability with the Broughton "5C ®" barrels. " Base on the fact that Shilen barrels threaded for the mauser are #2/3 contour I assume that you are building a hunting rifle that the reason I said at least 25" long barrel. If problem with the 284 case then go to a 280 case. Ackley data from Speer wildcat manual #4 published 1959 on the 7x57AI put his loading data @ 60Kpsi and that is the data I used in my 7x57AI. Don't get me wrong that I know all the answer you may be right. good luck on your project. [/QUOTE]
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7 x 57 ai
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