MV * 720 / Twist = RPM

Centrifugal force, or the "spin" is what kills bullets; NOT the velocity.
Over on shootersforum under the ballistics forum I have 22-call bullets RPM ratings. Or you can ALWAYS call the bullet manufacturer. MOST "premium" or tipped bullets have about a 280-290,000RPM limit. Older, lighter constructed bullets have about a 240-260,000RPM limit. Sierra Blitz has the highest rating of about 310-320,000RPM.