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Redesigned .300 Norma Magnum

Peterson Cartridge - .300 Norma MagSo, Peterson went back to work, designed new tooling and ran it again. Now the dimensions of Peterson’s .300 Norma and .338 Norma casings mirror those made by Norma.

The Peterson casings have always been made with harder heads that will tolerate more pressure and allow for more reloads. That hasn’t changed.

But for those who would like to buy USA-made .300 & .338 NMs, dimensionally equivalent to Norma’s, and would like to save a little money doing it, give Peterson a try.

About Peterson Cartridge

Peterson Cartridge is a family-owned, American manufacturer of match-grade, brass rifle casings and loaded ammunition that is among the most precise and consistent on the market, delivering discerning long-distance shooters sub-MOA accuracy. For more information on Peterson Cartridge or to purchase its match-grade brass casings, or loaded ammunition, visit

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Extremely consistent, American-made brass rifle casings and ammunition, designed for long-distance shooters.