Slamfires

[Xkv8r]

SSP, exactly my thoughts.

[marcvbsa]

Have you not mixed up your small pistol primers with your rifle primers?

[414gates]

Fairly certain I can rule out high primers as well, just inspected the remaining 300 odd cartridges from that lot and not one high primer to be found. So statistically, that cannot be the cause.

After firing, the primer won't be high anymore, it gets seated flush by powder ignition and impacting against the bolt face.

You can only check for high primers on unfired ammo, although high primers may cause chambering issues.

atunguyd makes a point, if the firing pin is floating, it can cause problems on soft primers.

PMP and CCI are the "hardest" primers I know of.

[LoopSoosStroop]

Winchester makes about the softest primers out there fwiw.

[BigT]

Winchester makes about the softest primers out there fwiw.

Federal are softer

[Skaaphaas]

After firing, the primer won't be high anymore, it gets seated flush by powder ignition and impacting against the bolt face.

You can only check for high primers on unfired ammo, although high primers may cause chambering issues.

atunguyd makes a point, if the firing pin is floating, it can cause problems on soft primers.

PMP and CCI are the "hardest" primers I know of.

Cartridges. Not doppies.

[shooty]

Federal are by far the softest.
Still have some. A 100 is packed in a holder that seems it can hold 300-500 compared to other primer packaging.

Where are the days Rosenthal CPT stocked them and CCI by the tons.

[Mojojojo]

Had a similar issue (slamfires) with reloaded ammo and the culprit was "untrimmed brass". After trimming and loading another batch the problem was solved.

[DS]

In my experience with shooting thousands of rounds in the AR platform it is very unlikely that a slamfire will occur with an in spec gun shooting in spec ammo.