RE: pellets or powder
I HAVE NEVER IN 47 YEARS HAD MY MUZZLEOADER NOT GO OFF DO TOO GEOX2F POWDER.
now, dul flint or frizzen not hard or wet pan powder, yes, i had miss fire.
mostly it was TOO SOFT FRIZZEN but never 2 f powder in barrel.
i leave my powder in gun for about 1 week in flintlock and never had it not go off.
i do leave gun in my garage in cold and never put it in front seat of warm truck going hunting, i have a gun case,plastic ones in my truck bed to haul it out to hunt.