hello

my NO4MK1 is piercing primers with SB ammo only and only 2 or 3 out of a box.the ammo works fine in 2 other enfields.any ideas?i thought bolt head, but mine is at the high for number2 and seems to be flat.im thinking firing pin and spring?PPU runs just fine in it with no issues.any thoughts or ideas would be great help.can i use my bolt from my other enfield and just use the original head to test if its a firing spring or would that be a issue with headspace?

dennis
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