6.5 Grendel denting brass when chambering

[TedBrewer5]

Glad to hear it seems to be better.
i use slander and ACS mags. Relieved the feed lips and the lowered the front edge on al my mags

[Steve_evetS]

the mags are what is causing your issue. the 45 degree transition on the forward feed lips. Before the chamber is putting a dent in your brass. dremel or file that transition & your dent will go away.

[HighDesertDrifter]

A friend has an 18" inch faxon gunner barrel and had the same issue. Had tried about every mag in existence with no change. Threw in a hydraulic buffer yesterday and for whatever reason seems to have done the trick. I run a 20" gunner and have had no issues. Matter of qc perhaps.

*Sorry captured spring, not hydraulic. He just corrected me.