12 to 15 grains of either should be ok.
I think most of us shoot at 25meters.
Expect your first groups to be about 12 to 18 inches, seriously.
How good are your eyes when shooting a rifle over conventional open sights? Thats got to be the best you could achieve with your pistol with practice and getting your loading sussed.
“If a cricketer, for instance, suddenly decided to go into a school and batter a lot of people to death with a cricket bat, which he could do very easily, I mean, are you going to ban cricket bats?” :- Prince Philip said after Dunblane