The serial # indicates that the gun was sold in 1974. The bore measures .451. What round balls and/or projectiles/powder should I purchase?
The Ruger Old Army should use .457 round balls. I personally use Pyrodex P @ 40 grains, with a "wonder Wad", it groups very well, and the recoil is very pleasant. but I seem to see more people prefer Triple 7 on Graybeard Forum.
One note - since I see this posted under Cowboy Action Shoot - Don't know about SASS, however, I heard that NCOWS will no longer allow the Ruger Old Army to be used since it is not based on a design prior to 1890. Maybe someone can expand on this, and give more info on SASS.