Breechplug - I would say that most muzzleloaders produce a different point of impact on the first shot from a clean and oiled barrel than from a fouled barrel. That does not mean that a gun can not shoot through the same hole every time on a clean and oiled barrel. It is, however, difficult to sight in a gun on a clean and oiled barrel because after one shot, you have to completely clean and oil the weapon, before you can shoot again, and ultimately adjust your sight or scope, to achieve the best point of aim for the clean barrel condition. In addition, if you enjoy target shooting, it wouldn't be much fun if your first shot punched the bull at 100 yds., but all those which followed, on a fouled barrel, were 4 to 6 inches low and right. If your hunting shots are less than 75 yards, it shouldn't make much difference, or at least pale in comparison to having a good rest from which to shoot or good shooting form. I would certainly fire a couple of caps or primers whether setting up for "clean barrel" shooting or not. I do not consider a barrel to be fouled by a cap or primer, and consider it good insurance against excess oil causing a failed discharge when using loose powder.