RE: Which type
My first muzzleloader wasa mule ear lock rifle andthat's still my sentimental favorite. I also have an short little underhammer, some sidelocks, and inlines include a Traditions shotgun & a .54Lyman Cougar. Both inlineshave the older plunger actions with a springpowered boltthat usethe #11 cap.
I mostly plink with PRB's and load with several different substitute powders:
Usually Pyrodex for PRB/shotgun shooting,777when shooting the smaller.36 caliber, and Clean Shot/APP fffgwhen hunting withthe scopedLyman.