SASS Shooters handbook, Page 11
The minimum standard for center-fire ammunition used in all smokeless categories in all SASS matches State, Regional, National, International, and World Championship Competitions is not less than a minimum power factor of 60 and no velocity may be less than 400 fps. The maximum velocity standard for revolvers is 1000 fps. The maximum velocity standard for rifles is 1400 fps. Pocket pistols, derringers, and long-range rifles are exempt from the power factor and velocity requirements.
Power factors are simply calculated by multiplying the bullet weight times the velocity and then the resulting number is divided by 1000. Some examples are as follows:
100 gr bullet traveling at 600 fps has a power factor of 60: (100x600)/1000=60.00
77 gr bullet traveling at 800 fps has a power factor of 61.6 (77x800)/1000=61.60
200 gr bullet traveling at 400 fps has a power factor of 80 (200x400)/1000=80.00
Fingers (Show Me MO smoke) McGee - AKA Man of Many Colts - Alter ego of Diabolical Ken; SASS Regulator 28564-L-TG; Rangemaster and stage writer extraordinaire; Frontiersman, Pistoleer, NRA Endowment Life, NMLRA, SAF, CCRKBA, STORM 327, SV115; Charter member, Central Ozarks Western Shooters
Cynic: A blackguard whose faulty vision see things as they are, not as they should be. Ambrose Bierce