Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Weatherby Ammunition With Precision, Power, And Versatility

  • 20 per box
  • 378 Wetherby Magnum
  • 300-grain centerfire ammunition
  • Round nose bullet type


The Weatherby Ammo 378 Wby Mag 300-grain is manufactured with quality and precision, offering shooters an outstanding product that can be counted on in a variety of applications. Designed with quality components, this ammunition provides the power, velocity and accuracy needed to take on your game of choice.

You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition. All ammunition must be shipped Domestic Ground. Shipping not available for International, DC, and MA residents. Residents of CA, DE, IL, NY and OH, may have additional restrictions. Always make sure you use the correct ammunition for your firearms. Check your state and local laws for any other applicable firearms and ammunition regulations. View full restrictions here.

Ammunition pricing is per box.

See Item Details Below



In Stock

Cartridge: 378 Weatherby Magnum

Bullet Style: Round Nose (RN)

Bullet Weight (Grains): 300

Muzzle Velocity (feet per second): 2820

Application: Hunting

Hunting Type: Big Game, ...

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