I have a very nice TC Hawken 50 cal I purchased that I believe was unfired. The bore was bright and shiney. I have been using Goex FF and patched RB with .10 patch lubed with Bore butter. I swab with a wet patch followed by a dry patch after each shot. I have tried both .490 and .495 RB. I can only get about 3" groups at 70 yards. I think my bigest problem is the sights. The bead is hard to see and it pretty much covers a 4" circle at 70 yards distance. Am I getting all I can get out of this gun or should it be doing better? So far every shot I have fired would kill a deer so that is a positive. I'm just not seeing tack driving accuracy.