Bore Butter or a like product was never intended to be used to aid loading in modern in-line ML guns. The idea is to coat the bore as the last step in the cleaning process AFTER shooting when the gun will be stored. This coats the barrel to prevent corrosion and rust. Before shooting you must swab with 1 or 2 wet patches and 1 or 2 dry patches to remove the Bore Butter. Then fire a primer to remove any moisture or lube still in the barrel. In the days of patches and round balls it was needed to aid in loading but that was mainly for percussion and flintlock guns.