Roy Weatherby's .24-caliber entry — the fastest commercial .243-bore cartridge ever produced. Pushes 100-grain bullets to 3,400+ fps, giving it a flat trajectory and energy level that bridges varminting and deer hunting with authority.
Type: Rifle
Introduced: 1968, United States
Parent case: .300 H&H Magnum
Standardization: SAAMI
Bullet diameter: 0.243" (6.17 mm)
Case length: 2.5" (63.5 mm)
Overall length: 3.1" (78.74 mm)
Max pressure: 65,000 PSI
Rim type: Belted
Primer: Large Rifle Magnum
Typical twist rate: 1:10
Muzzle velocity: 3300–3500 fps
Muzzle energy: 2100–2725 ft-lbs
Effective range: 400 yd
Common bullet weights: 87, 90, 100 gr
Primary use: Hunting, Target
Production status: Active
Also known as: .240 Wby Mag
History: Introduced in 1968 on Weatherby's belted magnum case. Roy Weatherby applied his maximum-velocity philosophy to the .24 caliber, producing a cartridge that significantly outperforms .243 Winchester and 6mm Remington. The .240 Weatherby is the only Weatherby cartridge based on a shortened .30-06 length case rather than the full Weatherby magnum case, giving it a slightly more manageable recoil…
Notable firearms: Weatherby Mark V, Weatherby Vanguard
Similar cartridges: .243 Winchester, 6mm Remington, .257 Weatherby Magnum