Hey mccoy, how are things across the big water.
Power factor in the competative gun world is :
Muzzle Velocity (Fps) X bullet weight in grains divided by 1000
Mv = 1000 Fps
bullet = 180 Grains
In IPSC there are 2 PF levels used to determine scoring. Major is 165 and Minor is 125 last I heard.
I hope that helps.