Thread: Bullet twist blow Up Numbers

Hi All,
Read an interesting thread on Snipers Hide about bullet blow ups.
The formula used to work out twist rates and rpms was as follows..
Velocity x 720 divided by barrel twist rate. Sum is RPM's which needs to be under 310000rpm so they say.
E.G. 3400fps x 720 = 2,448,000 divided by 8(twist) = 306,000. So for example a 75 grain 22 ELDM at 3400 should be safe with a 1 in 8, but a 1 in 7 at 3400 could be an issue.
Might help some one working out how fast a twist barrel to order if they are thinking of a specific bullet and speed goal.