Lone wolf,
I shoot BP from my 38-55 barrel. It came with the BC style stocks but I removed them for the monte carlo style, and no I'm not selling them. With the neck issue, get the straight comb shotgun stock with the recoil pad, and shooting 250gr bullets with BP the recoil is like a 22 magnum. Lots of smoke and noise, but no recoil. It's a real blast to shoot.
Or if you want to scope it get the monte carlo style. Still very fun.