i think ,that if the bullet is very easy to load ,and the temperature drops you will lose acuracy ..i swap my barrel after each shot [i have noticed that the muzzleloader likes a clean barrel ] i now use the T/C SHOCKWAVE it fits much tighter in my ROSSI ...also i can get 20 HORNADY SST but only 15 T/C SHOCKWAVE for the same price ,why ?????????