I have a JDJ barrel I had made for my encore in 50-70 and love it.
I shoot both black powder and smokeless in it ,but I use lead bullets that I make. I have also shot the 50 cal muzzle loader banded bullets that have a copper jacket or coating on them. they are awsome when you bust a buck they don't run far , maby 20 feet.you will like it whatever you do.