AmBraCol , The Center Of God's Grace
Ruger Old Army
Thursday, June 16, 2022, 05:39

I'd have no qualms about trying 4F in the Ruger Old Army. I used mine, years ago, with, uh...hmmm... unauthorized propellant to much higher pressures than you'd ever get with 4f. Don't think I'd try the same in a Colt open top type, but I'm older and wiser now than back then. Anyway, in the Ruger Old Army I've shot everything from 3F to Cartridge Grade (or whatever they called it - a pebbly looking powder) by Pyrodex (it was all I could get at the time). Then there were the excursions into "unauthorized propellant territory" that proved to me that the Ruger Old Army is basically indestructible with BLACK POWDER and equivalents.

As with any other powder, start low and work your way up to reach the accuracy/power you're looking for. Again - I speak only for the Ruger revolver, not the Italian imports and such as I've little experience with them, and none in anything other than 3f.