Holland & Holland's answer to the British colonial ban on .450-caliber rifles. Introduced in 1907 as a direct .450 NE replacement, the .465 H&H Magnum offers essentially identical performance in a caliber unrestricted by the 1907 ban. Chambered in some of the finest double rifles ever made.
Type: Rifle
Introduced: 1907, United Kingdom
Parent case: .375 H&H Magnum
Standardization: CIP
Bullet diameter: 0.468" (11.89 mm)
Case length: 3.25" (82.55 mm)
Overall length: 3.99" (101.35 mm)
Max pressure: 42,000 PSI
Rim type: Rimmed
Primer: Large Rifle
Typical twist rate: 1:14
Muzzle velocity: 2150–2175 fps
Muzzle energy: 4926–5037 ft-lbs
Effective range: 100 yd
Common bullet weights: 480 gr
Primary use: Hunting
Production status: Limited
Also known as: .465 Holland & Holland Magnum · .465 H&H
History: When the British government banned .450-caliber rifles in India and Sudan in 1907, Holland & Holland — whose reputation rested partly on the .450 NE — needed an immediate replacement. The .465 H&H Magnum was the result: same bullet weight, same velocity, same energy, different bore diameter. The difference from the .450 NE is so minor that professional hunters who used both reported no practical…
Notable firearms: Holland & Holland Royal Double Rifle, Holland & Holland .465 bolt-action
Similar cartridges: .450 Nitro Express, .470 Nitro Express, .500 Nitro Express