Weatherby .338-378 Weatherby Magnum ammunition (part no. M333262HCB) loads a 262-grain Hammer Bullets Custom for dangerous-game hunters taking on the world’s largest, most heavily boned animals. Weatherby built its name on high-velocity magnum cartridges, and its factory ammunition is loaded to the same demanding standard as its rifles. This lead-free, solid-copper bullet is machined with a wide, flat meplat that transfers energy through hydraulic shock rather than expansion or fragmentation, building a wide wound channel while holding together for full penetration. Cased and 20 to a box, it is built to feed reliably through bolt guns and semi-autos chambered for the cartridge. In our rifle ammunition lineup, this .338-378 Weatherby Magnum loading is a confirmed, dependable choice worth adding to the cart.

Key Specifications

• The chambering is .338-378 Weatherby Magnum, a hard-hitting .338-class Weatherby magnum built on the oversized .378 case for extreme velocity.
• The bullet weighs 262 grains, setting the balance of velocity and downrange energy this load is tuned for.
• The bullet is a Hammer Bullets Custom, the projectile Weatherby chose to load behind .338-378 Weatherby Magnum.
• This lead-free, solid-copper bullet is machined with a wide, flat meplat that transfers energy through hydraulic shock rather than expansion or fragmentation, building a wide wound channel while holding together for full penetration.
• The projectile is lead-free, making the load compliant in California and other jurisdictions that require nontraditional bullets.
• Each box holds 20 rounds, enough to confirm zero and still have rounds on hand.
• The box ships at about 2.145 lb, handy for estimating freight on a bulk order.

Frequently Asked Questions

What game is the 262-gr Hammer Bullets Custom built for? With .338-378 Weatherby Magnum behind it, this is a dangerous-game load, built for thick-skinned, heavily boned animals like elephant, buffalo, and rhino rather than deer-class game.

Is this ammunition legal in lead-restricted hunting areas like California? Yes, the lead-free bullet meets nontraditional-ammunition requirements in California and similar jurisdictions.

Buy the Weatherby .338-378 Weatherby Magnum 262 gr Hammer Bullets Custom

When the shot has to count, dependable ammunition is what separates a clean hit from a story about the one that got away. This Hammer Bullets Custom loading is built to be that dependable round. Order from our Lubbock, Texas gun shop and it ships fast to your door.