Several options. Best is to use a Dremel with a fine grit Cratex point(bonded rubberized abrasive) to polish the feed ramp. Don't try to remove any small ridges you may find. Just smooth the ramp to the existing contour. Go slow & easy. Then follow up with a felt bob loaded with a polshing compound such as Blue Magic for a mirror bright finish. If you own guns, you need a Dremel. preferably the flex shaft model.
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