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Seriously doubt that burrs under the feed lips would cause so much friction that the bolt won't strip a round from the magazine. I'd be looking at the bolt or carrier binding or dragging on some other part of the mag. Are you using brass or steel cased cartridges? Fully loaded? Over loaded? Only one or a few rounds in the mag? Do these hypothetical burrs (not seeing anything obvious in your pics) leave a noticeable scratch on the case?
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@1Devildog
Good call on seeing if there is bolt interference. Thanks! Will sharpie the mag tops and see if it is touching. If you feel the inside of the lips on the mags its sharp and rough... even the working ones. So I am totally going to see if the bolt is dragging.
5-10-20-full mags, dont matter, it has issues feeding.
The funny thing is.. with the good mags, the rifle only likes quality brass ammo.. and it runs 100% when using federal/winchester 5.56. Anything lacquered is a whole other issue.. they end up getting stuck in the chamber and need a cleaning rod to get out. Tight or rough chamber. Chamber honing is on my list, but since it does fine with quality ammo, not worried about it right now.