Colt AR-15 Target Match, Mod. 6600, 1 n 7 twist, 20": shoot a bullet, run a bore snake, repeat 10, 20, 30x's, how many? Then shoot what, 2 or 3 then bore snake, repeat how much? I have time and patience, but, I don't like to waste time either, do any of 'yall really have a good knowledge on proper bore "breakn' n"? I thought about trying 'sanding bullets'. I dunno, seems if they messed it up, I'd get mad 'bout it. In past, my hunting rifles, I didn't shoot a hundred or so bullets getting it broke in, and they all shoot straight as a taunt string, with a slight upper word curve back to zero,. Thanks folks for thoughts.