My cousin uses conical bullets intended for 36 cal cap and ball revolver. The "heel" part of this bullet is very short, but since neither of us had a 38 Colt mold, we gave it a try. It works, but you have to be careful with the loaded cartridges and seat the bullets by hand. Depending on your dies you may have to crimp by removing the seating stem and "following" the bullet out of the die with a punch, to keep it in the case. We tried the hollow base wadcutter trick, but it didn't work in his case with smokeless powder. It may work with black powder, but I don't use it in cartridge guns.
Mike
