Description
The 240 Weatherby Magnum takes its reputation as the fastest commercial 6mm cartridge and pairs it with one of the most meticulous bullet designs on the market. Weatherby's collaboration with Hammer Bullets means you're getting ammunition that was engineered to maximize what this cartridge can actually do.
These 72-grain Hammer Custom projectiles are machined on a CNC lathe from a solid copper blend, which is a completely different animal from traditional cup-and-core construction. Each bullet gets individually weighed and micrometer-measured during production, giving you consistency that translates directly to tighter groups and predictable performance downrange. The hollow point design is calibrated to shed petals on impact while the core stays intact, creating that deep wound channel without over-expansion or bullet failure at the velocities the 240 Mag produces.
Weatherby 240 WBY Performance
At 3,700 fps from the factory, this load keeps the trajectory flat out to distances where most standard 6mm options have already dropped considerably. That matters when you're hunting open country or need to make clean, decisive hits past 300 yards. The precision ammunition production you expect from Weatherby—premium brass, verified powders, quality primers—means the round-to-round consistency stays tight, which makes sighting in easier and follow-up shots more predictable.
Why the 72gr Hammer in This Cartridge
The lighter bullet weight in the 240 WBY keeps velocity high without pushing pressures to uncomfortable levels, which is part of why Weatherby's ballistics with this load work so well. Recoil stays manageable compared to heavier hunting magnums, but you still get that velocity-driven flat trajectory. This weight also works well on varmints and medium game where energy retention matters more than sheer mass.
Key Specifications
- Cartridge: .240 Weatherby Magnum
- Bullet Weight: 72 grains
- Bullet Type: Hammer Custom (solid copper)
- Muzzle Velocity: 3,700 fps
- Rounds Per Box: 20
- Case Material: Brass
- Primer Type: Magnum rifle primer
- Manufacturer: Weatherby
- Manufacturer Part Number: M24072HCB
- UPC: 747115450183
- Bullet Diameter: .243 inch (6.2mm)
- Reloadable: Yes (brass case)
What’s Included
- 20 rounds of factory-loaded ammunition
- Cardboard box packaging
Frequently Asked Questions
What rifles can I use this 240 Weatherby ammunition in?
This ammunition is designed for rifles chambered in .240 Weatherby Magnum, primarily Weatherby rifles like the Mark V series. Always verify your rifle's chamber before using any ammunition. If you own a Weatherby in this caliber, this factory load is optimized for the velocity and pressure characteristics of that platform.
How does the 72-grain Hammer bullet perform compared to heavier options?
The lighter 72-grain Hammer maintains extreme velocity while keeping recoil moderate and staying well within safe pressure limits. It works especially well on varmints and smaller to medium-sized game where the flatter trajectory and energy retention at distance matter more than raw bullet mass. Heavier 80 and 100-grain options exist if you prefer more impact energy.
Can I reload this brass?
Yes, Weatherby factory ammunition comes in reloadable brass cases. Once fired, the brass can be processed and reloaded following standard reloading practices for .240 Weatherby Magnum. Brass from magnum cartridges typically lasts several reloads before needing replacement.
What makes Hammer Custom bullets different from standard hunting bullets?
Hammer Bullets are precision-machined from solid copper on a CNC lathe, with every projectile individually weighed and measured. This manufacturing process creates exceptional consistency and a controlled-expansion design that sheds petals on impact while the core stays intact, producing a deeper wound channel compared to traditional cup-and-core construction.





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