brow_tines
Member
I was talking to another reloader the other day and he said he based his bullet weight on his barrel rate of twist. Therefore he shoots 62 grain bullets through his 22-250. Any thoughts on this?
I was talking to another reloader the other day and he said he based his bullet weight on his barrel rate of twist. Therefore he shoots 62 grain bullets through his 22-250. Any thoughts on this?
Twist = (CD^2)/L X Sqrt(SG/10.9)OK, so is there a formula or chart to figure out rate of twist and bullet weights ?
Cfull has it exactly correct. That's why one company's bullet will stabilize in a marginal twist barrel, when another company's bullet won't, even if they are both the same weight.The twist rate of a barrel determines what length bullet the barrel will stabilize. Weight is not part of the equation.
The idea of "best" is a complete misnomer. "Adequate" is the correct term. If the twist is fast enough to stabilize the bullet, you're good. Beyond that, you can stress about it and develop paralysis through analysis to no practical effect.
I looked up my new .270 wsm.... Says 10" for ALL bullets...http://www.shilen.com/calibersAndTwists.html
This is general info - as stated above, the actual bearing surface of bullet to bore is the key, but bullet weight will get you in the neighborhood.