The .32-20 is a much hotter cartridge than .32 Long. And it came in two versions, one suitable only for rifles. And I think that meant just the M-1892 Winchester and equivalent Marlin. It was too potent for the 1873 Winchester or revolvers.

Most cylinders were too early to have received heat treatment. I'd be very careful in handloading this ctg.

It is, BTW, said to be very loud to shoot, although not as bad as revolvers chambered for .30 US Carbine.

Personally, I'd pass on this gun and buy an M&P or Model 10 in .38 Special, made late enough to have a heat-treated cylinder.

The .32-20 is okay for small game and snakes, but the .38 is as good or better and ammo is a lot easier to find and cheaper.

I'd far sooner shoot a man with a .32-20 than a .32 Long, but the .38 Special is better than either. Alas, if you want an older gun, you shouldn't fire Plus P ammo in a .38.