Calculators for Barrel Twist Rate

Enter the following
Bullet Length in
Bullet Diameter in(")
Muzzle Velocity fps
Optimum twist is 1 in in (")

If the rifling twist is one turn in
And the bullet diameter is
And the velocity is fps
the maximum bullet length

Enter the following
Amount of MOA required
Rail Length (exact) in(")
Amount to mill off in (")