Hornady .300 Whisper

[lug]

Bought 4 boxes of the 110 V-Max when I was down in Montana and ran two of them thru my .300 Blackout chambered AR. 16 in barrel by Ron Williams and 3 position gas block by TP555. Worked good with a Magpul Pmag. Not so good with the surplus G.I. mag. Ran a few rounds with the gas shut off so I wasn't chasing brass. Didn't notice anything different until I got home and ran them thru the resizing die. The primers were flat. So note to self, be careful running supers with the gas off. Now I need to quit stalling and get some heavies and load up a bunch of subsonics.
Justin