Thread: .308 flattening primers

Federal 150gr blue box was IIRC around 2820fps from my factory lenght Sako at near 22", it and another Sako and 3 Tikkas I have used the same ammo in all had primers that looked like yours but had occasional swipe marks from extruding case head brass into bolt recesses.

That is all first firing of factory ammo in factory rifles.

Id say you are near max for that combination but wouldnt be too worried, neck sizing only will probably improve primer appearance but fed brass is soft and I would be surprised if bolt swipe didnt appear after one or two neck sizes and it has fully conformed to chamber.

Still safe tho....fed brass and primers are soft and show signs early.