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Caliber choice help
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<blockquote data-quote="Gamesniper19" data-source="post: 1534623" data-attributes="member: 95013"><p>Based on your ask and parameters, there are 2 calibers that I have experience with that would meet your demands to run 140 grain bullet at the speed and still be as "kid friendly" as one can be. The following opinion is based on an 8 twist 24" barrel:</p><p>6.5 PRC - might get to about 3120 or 3150 with a 140. Touching 3200 would be is possible and may cause pressure issues.</p><p>6.5 GAP - will get you to over 3200 and my personal load with that very bullet does. I run a 24" PROOF CF 24" barrel with 8 twist and 63.1 grains of H1000. I see magneto speed confirmed fps of 3220 and a SD of 9. 21.6 foot lbs of recoil energy. For kids under 12 I prefer to stay under 20lbs of recoil which is right about at the 308 level.</p><p></p><p>Both of these caliber are optimized for short or medium actions and I have no experience with them in a long action.</p><p></p><p></p><p>Now if you want to move into a Long Case you can easily achieve 3200+ fps and you will absolutely need a brake to keep it kid friendly. Anytime you move into a rifle with 70 grains of powder, it lands you in the 25 lbs of recoil energy range which is around 30-06.</p></blockquote><p></p>
[QUOTE="Gamesniper19, post: 1534623, member: 95013"] Based on your ask and parameters, there are 2 calibers that I have experience with that would meet your demands to run 140 grain bullet at the speed and still be as "kid friendly" as one can be. The following opinion is based on an 8 twist 24" barrel: 6.5 PRC - might get to about 3120 or 3150 with a 140. Touching 3200 would be is possible and may cause pressure issues. 6.5 GAP - will get you to over 3200 and my personal load with that very bullet does. I run a 24" PROOF CF 24" barrel with 8 twist and 63.1 grains of H1000. I see magneto speed confirmed fps of 3220 and a SD of 9. 21.6 foot lbs of recoil energy. For kids under 12 I prefer to stay under 20lbs of recoil which is right about at the 308 level. Both of these caliber are optimized for short or medium actions and I have no experience with them in a long action. Now if you want to move into a Long Case you can easily achieve 3200+ fps and you will absolutely need a brake to keep it kid friendly. Anytime you move into a rifle with 70 grains of powder, it lands you in the 25 lbs of recoil energy range which is around 30-06. [/QUOTE]
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