Weatherby 7mm Weatherby Magnum 146gr Hammer Custom

Weatherby‘s 7mm Weatherby Magnum ammunition (brand part no. M7MM146HCB) loads a 146-grain Hammer Custom bullet for hunters who want handloaded-level performance without touching a reloading press. Introduced nearly 20 years before the 7mm Remington Magnum became a household name, the 7mm Weatherby was Roy Weatherby’s original take on high-velocity 7mm performance, giving non-handloaders factory access to numbers most shooters could only get by rolling their own ammunition. The Hammer Custom bullet is a solid, monolithic copper design rather than a traditional lead-core bullet, with flutes machined into its flat nose that generate hydraulic force through tissue instead of relying on expansion. For 7mm Weatherby Magnum hunters who want penetration and factory-level velocity together, this rifle ammunition delivers both.

Key Specifications

• The chambering is 7mm Weatherby Magnum, introduced nearly 20 years before the 7mm Remington Magnum.
• Weatherby designed the cartridge to give non-handloaders handloaded-level 7mm magnum performance from a factory box.
• The bullet weighs 146 grains, matched to the cartridge’s high-velocity profile.
• The bullet is a Hammer Custom design, a solid, monolithic copper bullet rather than a lead-core design.
• Flutes in the flat nose generate hydraulic force through tissue, creating a large wound channel without traditional expansion.
• Because it’s solid rather than jacketed, the bullet retains essentially all of its original weight on impact.
• Each box holds 20 rounds, enough to confirm zero and still hunt the season.

Frequently Asked Questions

What makes 7mm Weatherby Magnum notable historically? Weatherby introduced it nearly 20 years before the 7mm Remington Magnum, giving shooters factory access to velocity that once required handloading.

Does the Hammer Custom bullet expand? No, it’s a solid, monolithic design; its flutes generate hydraulic force through tissue instead of relying on expansion.

Why choose a solid bullet over a traditional expanding one? A solid bullet retains essentially all of its weight and drives straight through heavy bone, where an expanding bullet might shed mass and slow down.

Buy Weatherby 7mm Weatherby Magnum 146gr Hammer Custom

Roy Weatherby built this cartridge to beat handloads at their own game, and the Hammer Custom bullet keeps that tradition running with modern solid-copper construction. Order from our Lubbock, Texas gun shop and it ships fast to your door.