Twist Rate Calculator

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Twist Rate Calculator 2017-01-13T21:33:27+00:00

Standard ammunition dimensions can be found here.



Suggested Twist

Bullet Length   in INCHES : REVOLUTION*
    *Round Down To Closest Half Twist
Bullet Diameter   in
Muzzle Velocity   fps
Bullet SG  

Bullet SG Values:


11.3 Lead
10.0 Jacketed
8.9 copper
8.5 brass
7.8 steel