So my dad bought an omega barrel off ebay. Thing wasnt bored worth a crap. Up top a .5015 sized lead bullet almost slides down with the weight of the ram rod. Problem is further down it goes the tighter she gets. Last 1/3 is super tight like using a palm saver and leaning on the ram rod. Anyone else had this problem? At 50 yards i got a 3” group with peep sights. Walked over to 100 and its a good 12” group. What would you do ?