Peterson Cartridge Co. of Pittsburgh, PA announced it is producing .300 Win Mag casings in two versions. Peterson makes the traditional SAAMI spec’d version that headspaces off the belt. But it also makes a version that headspaces off the shoulder. Peterson calls that version the .300 Win Mag- Long.

Peterson Cartridge Co. of Pittsburgh, PA today announced the addition of .300 Win Mag to its growing family of rifle casing calibers.