You don't have to load to max power for SASS.
"The minimum standard for center-fire smokeless ammunition used 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. "
Power factor is calculated by multiplying mass of projectile times velocity then adjust the decimal point by dividing by 1000. So if you are shooting a 150g bullet at 400ft/sec you have 60000/1000=60
It might have enough energy to poke a hole in paper (well maybe a bit more) and will be easy on your wrist.