Morning all,

Took my No4 to Bisley (UKicon) yesterday to put some rounds down on the ETR - shot 25 rounds and out of those, two had holed primers. Have done some research and a huge thread started by calling out head space issues; but then it started talking about short cases in PPU ammo. Considering I only had two out of 25 I am leaning towards the later, but just wanted some opinions.

My mates No4 was doing this with the exact same ammo in Wales a few months back when his firing pin was destroyed!
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