Originally Posted by robocop10mm
As several have pointed out, you are not crimping correctly. A roll crimp is for revovlers as they headspace on the rim. A taper crimp is for auto pistol cases that headspace on the case mouth. NEVER taper crimp in the same operation as bullet seating. The primer is showing some pressure signs. I would back off on the load. The WCC NATO brass is thicker than normal brass and will push a reasonable load to +P levels because of the reduced capacity.
Good info, thank you Robo.
I'm probably going to be buying a taper crimp die this week.