Black powder. 31 caliber 5 shot.. what a gold miner in California would have had in 1848.. . and a .36 caliber 1851 Navy which would have tamed the wild west. It is difficult to load too much black powder.. it if fits? is is probly ok but the standard load for a .31 baby is about 12 grains with a fifty caliber ball.. pure lead.. This is about 650 fps. for.. an energy level between a .25 auto and maybe a 32 short.. not a powerful round.
The 1851.. first really carry gun.. small enough to carry in a holster on your hip and able to stop a bad guy with one well placed shot out to 100 yards.. 83 grain lead round ball at around 1000 fps or a tad more.. energy about like a .38 spl or 9mm.. not exactly the cannon it was purported to be.. energy slightly less than a cheap target 9mm
Round ball.. this seems kinda dumb in the hollow point and other shape bullets of today.. but it is pure lead. what does that mean? it means the thing expands even at low velocities.. like a 22lr which is also pure lead. most 38spl and 9mm economy loads do not expand much or erratically.