I haven't bought factory ammo in years. The thing is, I cast with 20-1 alloy, it's fairly soft, and will bump up with a hefty charge of black powder, but I load fairly reasonable in smokeless, around 800FPS, and haven't shot black in the colt. There are things that can be done to overcome the chamber size issue, but the simple fact is it shouldn't have to be done on an expensive firearm like that. Hollow base is another fix for the issue, but I despise casting hollow base as most moulds are single cavity where as most of mine are 5-6 cavity moulds. If this was my only SAA, or at least my only 45, then I might consider tailoring a load for it, as it stands, I like ammo interchangeability.