The snubbie has fixed sites probably & regulated to 158gr bullet the lee 158 rnfp has shot good in all my 38/357 revolvers , from slow to giddy up !!!!
Another good 1 to start out with is the TL designs , the liguid alox will hold ya to 900fps or so all the little revolver will do .
Hodgdon has online data for the IMR ,WW & Hodgdon & theres Alliant also !!