The Weatherby Select Plus .240 Weatherby Magnum 72 Gr Hammer Custom delivers elite hunting performance from one of the fastest commercial 6mm cartridges ever produced. Loaded to a blazing 3 700 fps muzzle velocity this premium factory load features an exclusive Hammer Custom solid copper bullet - a CNC lathe-turned open-tip monolithic projectile manufactured by Hammer Bullets of northwest Montana to Weatherby's proprietary specifications. The Hammer Custom bullet is not available as a standalone reloading component; it exists exclusively in Weatherby-loaded ammunition ensuring this load performs exactly as engineered.Weatherby Select Plus .240 Weatherby Magnum 72 Gr Hammer Custom20 rounds per box | 10 boxes per case (200 rounds)Bullet: Hammer Custom - 100% solid copper CNC lathe-turned open tip (lead-free)Muzzle Velocity: 3 700 fps | Muzzle Energy: ~2 188 ft-lbsBallistic Coefficient: .320 (G1)Reliable expansion down to ~1 800 fps impact velocityBrass casing | Large Rifle primer | Belted bottleneck caseSKU: M24072HCB-BOX | UPC: 747115450183The .240 Weatherby Magnum was the last cartridge personally designed by Roy Weatherby and remains the world's fastest commercially available 6mm (.243-caliber) cartridge - outpacing the .243 Winchester and 6mm Remington by more than 300 fps. Paired with the Hammer Custom's hollow-point copper construction this load sheds controlled copper petals on impact for rapid energy transfer and minimal meat damage making it an exceptional choice for small and medium game hunting. Compatible with Weatherby Mark V and Vanguard rifles chambered in .240 Weatherby Magnum.