I have an old (40 yrs) CVA kit rifle that I had in my safe and now I have a renewed interest in flinters. Rifle has never been shot much. I’ve been to the range a couple of times. Lock works great. Nice hot spark. First two shots are on the money at 50 yds. After that shots are all over the place. I found that the fired patches were just a bundle of shredded threads. ???? .45 cal, .490 ball. 50 gr. Of Old Enysford 3f, Muzzleloader Original .015 pre lubed patches. Why would the patches be shredded? Wrong size? Old product? Sorry barrel? Help....