So I've got a new M70 Featherweight 7x57 on the way and 100 pieces of Norma brass ordered. Additionally, I have some 150 NBTs, 154 Hornadys and 160 NPTs and Sierras along with H 4350, 414, Big Game, RL19 and a few other powders laying around. Where do I start with loading modern, but safe loads in this cartridge? Any pressure data for 55-60,000 psi loads out there?
