I guess it's never a bad thing to have the capability to use more than one ammo , but I really see the .45 ACP cylinder as superfluous. Might have been a better deal back when surplus .45 ACP ammo was cheap. I guess ya could still use cheaper steel cased stuff like Wolf with no issues.

And to me , there's just something wrong about shooting ,45 ACP in a single action sixgun. The ACP was made for autos. The .45 Long Colt was made for thumb busters.