I think Spanners is on the right track. I suspect your chamber is on the tighter side of the acceptable tolerance and as such your die is not sizing the brass far enough around the base area. If the...
Type: Posts; User: Herbmiester
I think Spanners is on the right track. I suspect your chamber is on the tighter side of the acceptable tolerance and as such your die is not sizing the brass far enough around the base area. If the...