.340 Wby Mag
Introduced in 1963 and based on the .300 H&H Magnum, the .340 Weatherby Mag outperforms the .300 Ultra Mag, .338 Win Mag, and rivals the .375 H&H. Its flatter shooting, harder hitting characteristics make it ideal for even the largest of North American big game and more than suitable for any excursion to the African Serengeti.
Warning: Only use Peterson Cartridge Co. casings in firearms in good condition, designed, marked, and chambered for this cartridge. Do not use Peterson Cartridge Co casings for “fire forming” or any other purpose other than what they were designed and tested for. Peterson retains no responsibility for the enclosed casings if they are used outside of the manufacturer’s recommendations.