Recently my relatively new Stock II started to develop feeding issues, after about the first thousand rounds. Live round stove pipe, something that looked like a three point stoppage, and failure to fully chamber a round. Upon a review today, I found a small defect at the right edge of a feed ramp. Apologize for a lousy pic but It is seen well enough, little notch just before feed ramp meets the chamber. Is it a norm or a defect?