How to polish a 5.56 Feed Ramp
Just like the title says.. What is the best way to polish a standard AR-style feed ramp? I have a 5.56 handgun (PLR-16) that jams on occassion. I would be okay with the typical 1 in 100 rounds not seating, but this gun tends to jam once per 20-round magazine. The only thing out-of-norm is how tight the magazine is when inserted in the gun. I adjusted the mag well last year, and (generally speaking) it's now 'snug'. I prefer the magazines to drop out when released, and this gun requires a pull.
I don't think the jamming is related to the 'snug magazine', but added that as a just-in-case. Regardless, I applied some gun grease to the feed ramp, and the next 20-rounds fired freely. Between magazines, I sprayed dry-lube on the feed ramp, and it worked flawlessly. I would prefer not to spray shit, or apply grease every 20-rounds, so possibly polishing the feed ramp is needed.
Assume a dremel tool with a small polishing tip (?). Should I apply a mild abrasive? High RPM or does that vary based upon type of tip or polish? I don't see any indications of a scored ramp, and it looks like it has been deburred. Not as shiny as my AR platforms, but not sure that's required.