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JGW
04-25-2018, 08:14 PM
All - I read a few months ago about some Don McCoy built 30-06 chambered M1's (3 to be exact) that were built / "tuned" (?) for 190 gr projectiles for 1,000 + yard shooting. As I've explored this hobby more and more, I began to wonder what makes an M1 a 1,000+ yard rifle using 190 gr projectiles? It seems that all the accuracy enhancements would be the same, whether doing them for an "unlimited" - type build in .308, for 600 yards or less, etc.

Is it the twist rate of the barrel? Or how the gas port is "tuned" (if that is even something that makes sense)? Or . . . ??

Thanks.

JGW

canes7
04-25-2018, 09:40 PM
I’m not sure I understand the question but a rifle bring “tuned” for a specific bullet weight means that the throat was cut so X Bullet would be .0X0 off the lands and X length.

timshufflin
04-26-2018, 04:31 PM
I’m not sure I understand the question but a rifle bring “tuned” for a specific bullet weight means that the throat was cut so X Bullet would be .0X0 off the lands and X length.

I think you are talking about free bore? I imagine you are correct.

canes7
04-26-2018, 08:08 PM
I think you are talking about free bore? I imagine you are correct.

Yes Sir! Free bore.