I like cowboy guns. I'd love to pick up a .45 colt single action revolver with a .45 acp conversion cylinder one of these days. I don't reload, so the .45 acp conversion is almost mandatory as .45 colt is cost prohibitive.
Another option are these .22 lr chamber inserts for .45 colt revolvers (or similar ones for .45 acp). I had initially dismissed them because I couldn't understand how they would be accurate. Without a barrel to stabilize them, the .22lr bullet will just bounce down a .45 caliber barrel and wind up flying any which way. Turns out a portion of the insert is rifled so it acts as barrel and chamber in one. The actual pistol barrel would act like a giant flash hider. I'm still not sure I'd buy a set, but they no longer seem like a complete waste of money.