Ours is 40cal or larger bore. The regs make no mention of bullet caliber required. Tomorrow i may find out if the Super DISC 45 likes to be shot say-bo-less. I found a nice completely covered 100 yard range that only cost $3/hr and the targets are free.

There is rain in the forecast though and even BH209 can be an issue in high humidity when shooting say-bo-less.