shouldn't effect accuracy much just ability to get perfectly clean due to the pitting.. Ive got a couple Knight rifles I bought dirt cheap due to neglect, both look like a log chain was dragged thru them.. but both will shoot into a 1.5 inches at 75 yds or better, bad thing is you have to swab every shot or sabot is very hard to get down barrel.. takes forever to get clean also, minor pitting wont hurt as long as you clean/oil well if not it will keep getting worse.
