.465 H&H Magnum
Encyclopedia
The .465 Holland & Holland Magnum also known as the .465 Holland & Holland Belted Rimless or more simply as the .465 H&H Magnum, is a modern big bore firearms cartridge
introduced by Holland & Holland
in 2003 together with the .400 H&H Magnum
. The .465 H&H Magnum is a .468 caliber, belted, rimless bottlenecked cartridge. The cartridge is a necked-up, shoulder-lowered tapered cartridge based on the .378 Weatherby Magnum
case.
. Holland & Holland director Russell Wilkins undertook the project which culminated in the .400 H&H Magnum and the .465 H&H Magnum cartridge designs. The original design requirements called for a muzzle energy of over 6000 ft·lbf (8,134.9 J). To meet this requirement Holland & Holland chose the .460 Weatherby Magnum
case as a starting point in their design.
This .465 H&H Magnum cartridge is not the same as the famous .500/465 Nitro Express also designed by Holland & Holland for "India" double rifles. The .500/465 Nitro Express is the only other cartridge with the same bullet diameter as the .465 H&H Magnum. Both cartridges are designed to fire a 480 gr. .468 caliber (11.89 mm) bullet. Although, the cartridge is capable of operating at rather high pressures, Holland & Holland chose to load the cartridge to a moderate pressure of around 47000 psi (3,240.5 bar). The moderate pressure of the cartridge ensures reliability and safety in the tropical climes in which the cartridge was intended to be used. Furthermore, the taper and shallow shoulder of the cartridge aids in the smooth, reliable feeding and extraction.
The .465 H&H Magnum is an excellent cartridge for all-around game and African dangerous game including the Big 5. It has a similar trajectory to that of the .375 H&H Magnum. It is considered as the best-balanced cartridge for hunting dangerous game in India.
Ammunition for the .465 H&H Magnum is being manufactured by Wolfgang Romey for Holland & Holland.
The .465 H&H Magnum is based on the .460 Weatherby Magnum case, itself based on the .378 Weatherby Magnum. Holland & Holland took the .460 Weatherby case and moved the shoulder back, creating a longer neck for the cartridge, and increased the body taper of the cartridge to improve feeding reliability. The case is also necked up to accept a .465 caliber (11.65 mm) bullet.
Rifles chambered for the .465 H&H Magnum have a bore ∅ of 11.65 mm (0.458661417322835 in) and a groove ∅ of 11.87 mm (0.467322834645669 in). Twist rate for rifles can range from one revolution in 406 mm (16 in) to 711 mm (28 in). The maximum average pressure suggested for the cartridge is 4300 bar (62,366.2 psi).
Cartridge (firearms)
A cartridge, also called a round, packages the bullet, gunpowder and primer into a single metallic case precisely made to fit the firing chamber of a firearm. The primer is a small charge of impact-sensitive chemical that may be located at the center of the case head or at its rim . Electrically...
introduced by Holland & Holland
Holland & Holland
Holland & Holland is a British gun-maker based in London, England. They offer hand-made sporting rifles and shotguns. H&H holds two Royal Warrants.-History:Holland & Holland was founded by Harris Holland in the year 1835....
in 2003 together with the .400 H&H Magnum
.400 H&H Magnum
The .400 H&H Magnum also known as the .400 Holland & Holland Belted Rimless or the .400 Holland and Holland Magnum is a .411 caliber belted rimless bottlenecked cartridge introduced in 2003 by Holland & Holland together with the .465 H&H Magnum in 2003...
. The .465 H&H Magnum is a .468 caliber, belted, rimless bottlenecked cartridge. The cartridge is a necked-up, shoulder-lowered tapered cartridge based on the .378 Weatherby Magnum
.378 Weatherby Magnum
The .378 Weatherby Magnum was designed by Roy Weatherby in 1953. It was an original belted magnum design with no parent case, inspired by the .416 Rigby and headspacing of the belted .375 H&H Magnum. The 215 magnum rifle primer was developed by Federal specifically for this round. The cartridge can...
case.
General information
Holland & Holland began receiving requests from potential customers for a cartridge that would provide more power than the .375 H&H Magnum.375 H&H Magnum
The .375 Holland & Holland Magnum is a powerful rifle round and one of the best-known and most popular medium-bore cartridges in the world. The .375 H&H was only the second cartridge ever to feature a belt, now common among magnum rounds. A popular misconception is that the belt is for headspace,...
. Holland & Holland director Russell Wilkins undertook the project which culminated in the .400 H&H Magnum and the .465 H&H Magnum cartridge designs. The original design requirements called for a muzzle energy of over 6000 ft·lbf (8,134.9 J). To meet this requirement Holland & Holland chose the .460 Weatherby Magnum
.460 Weatherby Magnum
The .460 Weatherby Magnum is a belted, bottlenecked rifle cartridge, developed by Roy Weatherby in 1957. The cartridge is based on the .378 Weatherby Magnum necked up to accept the bullet. The original .378 Weatherby Magnum parent case was inspired by the .416 Rigby...
case as a starting point in their design.
This .465 H&H Magnum cartridge is not the same as the famous .500/465 Nitro Express also designed by Holland & Holland for "India" double rifles. The .500/465 Nitro Express is the only other cartridge with the same bullet diameter as the .465 H&H Magnum. Both cartridges are designed to fire a 480 gr. .468 caliber (11.89 mm) bullet. Although, the cartridge is capable of operating at rather high pressures, Holland & Holland chose to load the cartridge to a moderate pressure of around 47000 psi (3,240.5 bar). The moderate pressure of the cartridge ensures reliability and safety in the tropical climes in which the cartridge was intended to be used. Furthermore, the taper and shallow shoulder of the cartridge aids in the smooth, reliable feeding and extraction.
The .465 H&H Magnum is an excellent cartridge for all-around game and African dangerous game including the Big 5. It has a similar trajectory to that of the .375 H&H Magnum. It is considered as the best-balanced cartridge for hunting dangerous game in India.
Ammunition for the .465 H&H Magnum is being manufactured by Wolfgang Romey for Holland & Holland.
Specifications
As of December 2010 neither the CIP nor SAAMI have published specifications for the .465 H&H Magnum. The cartridge is considered a proprietary cartridge at present as no other manufacturer offers rifles or ammunition in the .465 H&H Magnum.The .465 H&H Magnum is based on the .460 Weatherby Magnum case, itself based on the .378 Weatherby Magnum. Holland & Holland took the .460 Weatherby case and moved the shoulder back, creating a longer neck for the cartridge, and increased the body taper of the cartridge to improve feeding reliability. The case is also necked up to accept a .465 caliber (11.65 mm) bullet.
- .465 Holland & Holland Magnum cartridge schematic: All dimensions in millimeters [inches].
Rifles chambered for the .465 H&H Magnum have a bore ∅ of 11.65 mm (0.458661417322835 in) and a groove ∅ of 11.87 mm (0.467322834645669 in). Twist rate for rifles can range from one revolution in 406 mm (16 in) to 711 mm (28 in). The maximum average pressure suggested for the cartridge is 4300 bar (62,366.2 psi).