I have a circa 1886 medium frame Colt Lightning rifle that's been in my family most likely since new, but at least since the early 1920s. It's in good mechanical condition and decent cosmetic condition, although it has suffered over the past 40 years that I have had it, which embarrasses me quite a bit. It is a family heirloom and recently I have thought about putting it back in action. I don't want to damage it any further but i don't think running a few cowboy loads through will hurt it. Any recommendations on ammo?