I've embarked on a project to turn a model 19 S&W into a 32-20. All that is needed is a new barrel and cylinder. I got the barrel (model 16 .32 mag 8 3/8" barrel) from Numrich arms, but they didn't have a cylinder ( they're a bugger to fit and time, etc. anyway).
So I'm planning on reaming out the front cylinder mouths of the old cylinder, and then pressing in six sleeves and rechambering the sleeves. Has anybody here done this already? Also, the idea of using brass for the sleeves (the cylinder is a .357 caliber remember = plenty strong regardless of sleeve) has occurred to me. It should stay put better, especially if high pressures caused it to stretch and stick as a cartridge case would.
Imput is most welcome.