Ok so I have the formula we use which is the same as used in the Basa shoot.

This power factor is based upon a foot pounds calculation. It could be done using another method of calculation for another power factor. None are perfect. This one was derived from BASA and it seems just fine as it rewards those who use powerful rifles.

The formula:

1+ ((Bullet Weight) x (Velocity x Velocity)) / 4502400000

The above formula gives the power factor which is then used in the following formula:

Power Factor x Score x (K / time in Seconds) where K is 385.8322563

This final formula gives your score and it is designed to favor bigger calibers. We have it set up on a Excel Spread sheet and is very easy to use.

Matt.