BPGuy said:
I will add my 2 cents. I have a .45 convertible Bisley. I later obtained a .45 LC only. I put the ACP cylinder on the "new" gun; it fit fine and seemed as if it would work. When I fired it, it fired the first shot fine, but then wouldn't rotate. Don't have any idea what the problem is, but this does seem to indicate that even if a cylinder seems to fit well, it still may not work.
Good luck with your search.
BPGuy,
Your rotation problem illustrates just what Robert 58 described. Because of the different lengths of the ratchet boss, you didn't have enough headspace for the cartridge rim and once the first shot was fired, the deformed primer rubbed on the recoil shield.
The hammer does not have enough leverage to turn the cyl against that resistance. You need a shim in the recoil shield depression for the ratchet. Once you determine the proper shim thickness, then you'll find out if the cyl becomes to long for the frame; either at the bar/cyl gap or the front cyl pin boss, or both.
The pin boss is simple to fit, just stone it down till the cyl fits in the frame. Then address the bar/cyl gap. If it's a tight gap with the original cyl (under .005"), you can take a little off the end of the barrel for the new cyl. If you can't take enough for the new cyl to fit w/o making the old cyl have too large of a gap (you can go up to .008" and have a proper gap); then reduce the ratchet shim a bit and strike a compromise that will still let the new cyl shoot and rotate.
Another fitment to avoid shims is to face off the rear of the new cyl a few thousands to increase the length of the ratchet boss and correct the headspace. But keep an eye on the bar/cyl gap so it doesn't become excessive.
