Shooting factory new Freedom Munitions 165g Hush out of a suppresses MPX. Halfway through the mag, I pull the trigger but no bang. I clear the chamber to find round pictured. I gave the gun a “once over” and finished the mag, and 3 more mags. I have ran well over 500 rounds of that ammo though my MPX without an issue. I have never seen a primer ignite but not go bang. As you can see the primer looks like it blew out the sides.
I’ve never had this happen, maybe more common than I realize. What would cause that? Primer not seated correctly?