7 mm Remington Ultra Magnum | Norma Precision - ammunition Just saw this on Normas website. Not sure if its been out for a while and i over looked it or what, but as soon as i can find some of the Norma 7mm RUM brass im ordering it! Should be no prob to neck it up to .300rum. Headstamps dont bother me. Worse case, i will just order loaded ammo and pull the bullets. Unless for some reason they will be using a different manufacturers brass?