A hang-fire or miss-fire can be caused by several things.
I have a like new 308 bolt action that had miss fires. The firing pin made light hits on the primer.
The brass was new WW handloaded with winchester WLR primers. The load is a normal one with Varget powder and 150 grain Bergers.
I made a no go headspace gage and it went in!
A no go gage is not supposed to chamber! "Excessive headspace"!
The rifle has been sent back to the manufacturer.
