I have a 450+ pieces of once-shot norma brass that came from this type ammunition. Shot both our of semi-auto and bolt action rifles. The primer pockets have these three little indentations. I'm not sure if I should do anything differently when prepping this brass. I primered a few and the primers went in and held without a problem, as far as I can tell. For this kind of brass, is there anything different I should do?

