My 629 has a 7 3/8 barrel the load that seems to work best is 240 nosler 22.5 w296.If I werent so computer illiterate I would send some pictures Im lucky to get words back to yaI bought a super black hawk at a real good price,but man is it a hawg leg 10 in. barrel,Im thinking about reselling it. Bruce check your regs.,I know we're not allowed to use a bullet,I think smaller than a .357.