Hi,
Any advice on Black powder proof charges?
I would like to reproof (home made proof) my Snider double rifle as it have been abused by previous owners. I have shot more then 60 times without any problem but just want to be shure.

Standard Snider charge was 70gn of FFg over a 480gn lead bullet.
Im thinking about something like 90-100gn of FFFg (the only powder I can get) onver 510gn bullet.

Any advise will helps.
Thanks
Martin