If I had any sort of discipline, vintage single shot .22s would be the only things I’d chase.
The .22 conversions are great fun. The one I had was made by the late Dave Crossno. It was a .45-70 case with a 24” barrel made from a .22 liner. I still don’t know how he attached the liner to the case and reamed the chamber but there were foam rings around the barrel every few inches and everything but the cartridge case was sealed in shrink wrap. It made for a very tight fitting system and you could adjust the windage by rotating the cartridge case if you didn’t want to change your tang sight.
The first time I shot it was during a range trip with the shooting buddy I’d horse traded with to get the Quigley. I made sure to get there first and install the conversion before he got there and loaded it while he wasn’t looking. I asked him to spot for me and out of that 34” barrel the sound wasn’t much louder than a primer popping. He looked at me and asked “Misfire?”. I jut grinned and popped the empty .22 case out and held it up. He kept looking at me, the fired .22 and the rifle trying to put the pieces together. Once I showed him the whole thing, the conversation was something along the lines of “If I’d know about those you might never have gotten that rifle”. 🤣