If wanting to re-barrel it, I'd be inclined to try something like the H&R .32 mag. case. It will handle light smokeless and black powder loads as well yet has enough length to give decent ballistics. I'd be looking for something in the 1,200fps to 1,300fps range with an 80 to 90gr. lubed lead bullet. I think it would make a really fun gun to shoot. I once made up a .32 S&W Long on a Steven's favourite. It was a blast to shoot & did in quite a number of ruffled grouse for me. 2gr. of bullseye and a 100gr. bullet. I used a piece of worn out Winchester Palma Trophy match barrel. Still have it - the non worn, .32 S&W part. I used a twist drill for chambering - and a perfect job it did.