Many muzzleloaders shoot the first shot from a clean, cool barrel to a different spot than the succeeding ones. That' s why a lot of ML shooters will fire a " fouling shot" before hunting or beginning to shoot a group. Bore butter, or any thick goopy lubricant, can accentuate the tendency for the first shot to go out of the group. Remove it thoroughly before shooting. Use a clean solvent, like rubbing alcohol, on a couple of patched to get the stuff out, then dry the bore with a couple of dry patches before shooting.

Don' t use Bore Butter as a preservative in a clean barrel to prevent rust! It is miserable for this purpose. Once you' ve gotten your barrel squeaky-clean, preserve it with Birchwood-Casey Sheath by swabbing the bore a couple of times with this stuff on a patch. It dries, leaving a protective coat which prevents rust, and you can load and shoot later on without worrying if the Sheath will contaminate your powder charge. It won' t, and usually doesn' t affect point of impact of the first shot as much as other preservatives.