MagnumManiac
Well-Known Member
I had the same issue, contacted Winchester, they took the bad primers and replaced my bolt…
The cause of the pinhole is incorrectly annealed brass sheet, when the cups are punched, minute fracturing occurs which pinholes upon firing.
Here's some pics.
The cause of the pinhole is incorrectly annealed brass sheet, when the cups are punched, minute fracturing occurs which pinholes upon firing.
Here's some pics.