after I shoot 3 shots and let barrel cool down and try again....accuracy isn't the same. I know that doesn't really make sense. Doesn't make sense to me why as the barrel gets dirty, it doesn't seem to shoot at all. Will the 300's have any tighter fit. I know diameter is still .452 I think i need something to load tighter than what I've been trying. Also, how about N120 powder? What is your opinion on it? Also what sabot do you recommend?