There are a wide # of possibilities.

A .38 SPL case easily holds 13gr. 3F along with a 150gr. bullet- maybe 900fps from a 22" bl.

A .357 case holds about 16 to 17gr. - right about the speed of sound with that same bullet - from a 22" bl.

Both are easily loaded to whatever pressure you want or is safe in that action.

NICE little ctgs. and fun to shoot, easy to load. Easily acquired brass, bullets and powder.