good clarification here !! that "dominion" brass was definitely number four .................large rifle primer pocket tho
I have a buddy who swears black and blue that starline brass is semi balloon head (no4) - and thus holds two more grains of BP, he's 85 yrs, part mule, and will not have it that the optical illusion he sees when he squints into a new shiny case ...is just the light faking him out.