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Rifles, Reloading, Optics, Equipment
Gunsmithing
243 or 243 ai
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<blockquote data-quote="Trickymissfit" data-source="post: 812223" data-attributes="member: 25383"><p>Ackley developed the .243 Ackley to help fix some of the issues with the .243 Winchester, and an increase in velocity was not in his mind. The only serious gain in powder capacity is from the 40 degree shoulder, and that's not all that much for the effort. But it still some. The .243's are well known barrel eaters do to their turbulance point and the short neck length (the TP is actually out in the throat). You'll gain roughly .006" in the case diameter at the shoulder at best. 150fps is a realistic gain (if your lucky), but most of the issues will still be there. </p><p> </p><p>A Savage action unlike a Remington is a little longer. I think it's either .150" or .187" longer. A 57mm case will cycle thru it with no problems (I have a mod 12), but will a 6mm case fit in your magazine is another story. A 6mm Remington is a far better round, and a 6mm Ackley is a true long distance call.</p><p> </p><p>What you could do, is to ream the chamber with a 6mm Ackley chamber reamer to headspace off a .243 Ackley gauge. Then either use 6mm brass or necked down 6.5 Sweed brass. Sounds hard to do, but is really very easy to do. With this round you get the best of it all. The desired longer neck length, and a much better TP point (Inside the neck). Barrel will last twice as long as a standard .243 and probably much longer than the .243AI. Ontop of this and the longer neck length is that the longer bullets like the 105 grain Amax will not be seated into the shoulder area. Then you gain even more powder capacity. Best of everything.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 812223, member: 25383"] Ackley developed the .243 Ackley to help fix some of the issues with the .243 Winchester, and an increase in velocity was not in his mind. The only serious gain in powder capacity is from the 40 degree shoulder, and that's not all that much for the effort. But it still some. The .243's are well known barrel eaters do to their turbulance point and the short neck length (the TP is actually out in the throat). You'll gain roughly .006" in the case diameter at the shoulder at best. 150fps is a realistic gain (if your lucky), but most of the issues will still be there. A Savage action unlike a Remington is a little longer. I think it's either .150" or .187" longer. A 57mm case will cycle thru it with no problems (I have a mod 12), but will a 6mm case fit in your magazine is another story. A 6mm Remington is a far better round, and a 6mm Ackley is a true long distance call. What you could do, is to ream the chamber with a 6mm Ackley chamber reamer to headspace off a .243 Ackley gauge. Then either use 6mm brass or necked down 6.5 Sweed brass. Sounds hard to do, but is really very easy to do. With this round you get the best of it all. The desired longer neck length, and a much better TP point (Inside the neck). Barrel will last twice as long as a standard .243 and probably much longer than the .243AI. Ontop of this and the longer neck length is that the longer bullets like the 105 grain Amax will not be seated into the shoulder area. Then you gain even more powder capacity. Best of everything. gary [/QUOTE]
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243 or 243 ai
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