Why is my mini 14 shaving bullet end as it feeds left side of mag

does it happen when you push a round out without the mag in the rifle? Is it happening because the mag, or the chamber?

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"The very atmosphere of firearms anywhere and everywhere restrains evil interference - they deserve a place of honor with all that's good." -George Washington

It's hitting the chamber as the bolt pushes it in, just out of the left side of the mag though.

Sometimes chambers arent finished like they should be. You can roll the edge a tiny bit with a dremel and a fine sanding drum.

ive read this idea on this site:
take a wood dowel rod and insert it into the bore all the way through the chamber. Then glue or epoxy a flawless brass case on the end of it. Pull it into the chamber and twist the rod. push it out, break the rod, then inspect the casing for a cut that circumvents the casing for an idea of where and how bad the chamber bur is. If its a major cut, call ruger.

__________________
"The very atmosphere of firearms anywhere and everywhere restrains evil interference - they deserve a place of honor with all that's good." -George Washington

So I dremmeled the lead egde of the chamber where I noticed them hitting, wasn't much at all, but it was enough. Feeds whole mag without any damage to lead of bullet. Thanks for the help !!!