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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Best 240 to convert from 700 BDL originally 30-06
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<blockquote data-quote="merbeau" data-source="post: 563948" data-attributes="member: 38494"><p>High Outlaw</p><p> </p><p>Thank you for replying. After a great deal of more investigation based on the comments I have received, I have pretty much zeroed in on the 6mm Ack Improved. Sure looks like your rifle will shoot. </p><p> </p><p>The Ackley seems to have a longer throat which should be beter for barrel life and for longer bullets although I plan on shooting under 100 gr. projectiles. It also has some good potential accuracy as demonstrated by your post.</p><p> </p><p>I used the Miller Stability coefficient to investigate barrel twist and it would appear for my application 1:10.5 would produce stabilitty from 51 to 90 grains without much problem. According to the Miller equation anything less than 1.4 would not be stable and anything above 2.0 would indicate a faster twist rate could be used. The US Military has adopted 1.5 as their thershold.</p><p> </p><p>I went through 127 bullet combinations and selected those that were all 4 or 3 out of 4 are stable from 1:12 to 1:10.5 - do you have a preference?</p><p> </p><p>I would probably start with the Berger 68 gr. match.</p></blockquote><p></p>
[QUOTE="merbeau, post: 563948, member: 38494"] High Outlaw Thank you for replying. After a great deal of more investigation based on the comments I have received, I have pretty much zeroed in on the 6mm Ack Improved. Sure looks like your rifle will shoot. The Ackley seems to have a longer throat which should be beter for barrel life and for longer bullets although I plan on shooting under 100 gr. projectiles. It also has some good potential accuracy as demonstrated by your post. I used the Miller Stability coefficient to investigate barrel twist and it would appear for my application 1:10.5 would produce stabilitty from 51 to 90 grains without much problem. According to the Miller equation anything less than 1.4 would not be stable and anything above 2.0 would indicate a faster twist rate could be used. The US Military has adopted 1.5 as their thershold. I went through 127 bullet combinations and selected those that were all 4 or 3 out of 4 are stable from 1:12 to 1:10.5 - do you have a preference? I would probably start with the Berger 68 gr. match. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Best 240 to convert from 700 BDL originally 30-06
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