Outside of two dud primers from the same pack of CCIs many years ago (and I did find a loose anvil on my reloading bench afterwards), I've never had any brand of ammo nor brand of primer fail to fire in any firearm I own, including the brand in question. That includes many rounds with obvious "high" seated primers.


I'd question the gun before I question the brand of ammo. Your gun is riding on the marginal edge of reliable.