08-30-2015, 05:31 AM
I use adjustable gas blocks on all of my Grendels. I start out by shooting one round out of my mag and continue to turn "open" my gas block till the bolt carrier catch holds the bolt carrier back . I'll then turn another couple clicks on the adj gas block for reliable gas pressure . Then I'll shoot three rounds out of my magazine and then fill the mag testing for malfunctions. If a mag fails it will usually be on the last few rounds indicating a weak spring or sticky follower. If your rifle has enough gas to engage the bolt carrier catch with one round repeatedly you may have a magazine problem or extractor, ejector issues. Have you tried shooting factory ammo eliminating a problem with your reloads?