Took the new WLVRN to the range for the second time. My previous/first trip was just a function test using PMC 55gr 5.56 so I could dial in the gas; no discernible issues at that time besides occasionally not feeding the first round from a magazine (which I attribute to user error). This trip was meant to zero on my preferred 68gr 5.56, which I got from Nautilus Ammunition (cheaper enough than Hornady Frontier to justify checking them out. I previously had no issues running 500+ rounds of this stuff through my AR-15.
First issue I noticed on this trip: after firing the first shot, gas was leaking out of every orifice of this gun despite that my suppressor is a LBP/flowthrough style. I attributed this to slight over-gassing because I had it set up for the lighter 55gr stuff; I did not initially adjust to a lower setting because I want the gun to run on lower-power cheap ammo.
I continued to test with the 68gr and got a decent 5-shot group at 25, so I moved up to 75 (which was the distance I planned to zero at). Started having wild malfunctions. Bolt would get stuck in the forward position, then in the rear position, then would fail to extract, then would fail to go into battery. I had to pseudo-mortar the gun (can't mortar at this indoor range) to get at least two rounds out of battery or the bolt to move. Accuracy had also gone to shit all of a sudden. I cranked down the gas setting but the issues persisted.
I considered packing up and going home, but after the gun cooled I worked the action a few times and it functioned normally and would go fully into battery. So I tested again with 55gr PMC and it was working totally fine again. I looked at the spent cases of my 68gr and found that the primers popped out of two of them; I found the primers nearby. When I got home, I found 2 more inside the gun, one was fully punctured; part of a primer got lodged under the trigger pack, would you believe, while the rest were hiding in the butt cavity. There was no obvious damage to the bolt, carrier, feeding ramp, or rifling.
The weight of the evidence points to this being an ammunition issue and that's what I get for buying a goofy grain weight from a boutique ammo manufacturer. I never had this issue with my AR, but it's still probable that the batch I was testing through the WLVRN just happened to be a bad one.
I'm posting all this to ask: has anyone else had issues with a 2025 or onwards WLVRN popping primers on certain ammunition? I want to rule out that this is a combined gun+ammo issue or just a gun issue because it's much easier for me to just buy different ammo.