Has anyone tried the Barnes XPB bullets in their muzzleloaders? I've read of the regular Barnes MZ bullets being very hard to start down the barrel and thought maybe of trying the .451 pistol bullet in a Harvester Sabot. I normally use a Hornady .452 XBT but have been trying to shift away from lead bullets. I have a Lyman Deerslayer flintlock and a Traditions Pursuit both in 50 cal.