TOP Gun calculator

See what the TOP Gun Formula estimates from this rifle's weight, bullet and velocity—then compare it with the groups you actually shoot.

A reference, not proof

TOP Gun estimates a reference value from the numbers you enter. It cannot tell you how this rifle and load will group on your target.

What you are shooting

Enter the rifle and load values. The calculator converts units before it runs the formula.

Include scope and accessories.

Bullet weight.

Velocity at the muzzle.

Leave empty when you do not have this value.

See the formula's reference value

Enter the rifle and load values to calculate a reference, then compare it with real target groups.

No values entered