.476 Nitro Express

.476 Nitro Express
Place of originUnited Kingdom
Production history
DesignerWestley Richards
Parent case.500 Nitro Express 3"
Case typeRimmed, bottleneck
Bullet diameter.476 in (12.1 mm)
Neck diameter.508 in (12.9 mm)
Shoulder diameter.530 in (13.5 mm)
Base diameter.570 in (14.5 mm)
Rim diameter.643 in (16.3 mm)
Case length3.00 in (76 mm)
Overall length3.77 in (96 mm)
Primer typeBerdan 0.254 inch
Ballistic performance
Bullet mass/type Velocity Energy
520 gr (34 g) 2,100 ft/s (640 m/s) 5,085 ft⋅lbf (6,894 J)
Test barrel length: 28 inches
Source(s): Barnes & Amber

The .476 Nitro Express, also known as the .476 Westley Richards,[1] is a British rifle cartridge introduced by Westley Richards around 1907.


The .476 Nitro Express is one of several rounds (including the .500/465 Nitro Express, .470 Nitro Express, .475 Nitro Express, and .475 No. 2 Nitro Express) developed as a replacement for the .450 Nitro Express following the British Army 1907 ban of .450 caliber ammunition into India and the Sudan, all with comparable performance.[2]

Westley Richards created the .476 Nitro Express by necking down the .500 Nitro Express 3".[3]


Available in single-shot and double rifles, it was less popular than the above-mentioned rounds. It is nearly identical in performance to a number of others in the same class.

The .476 is considered adequate for all African and Indian big game,[2] including elephant and rhinoceros. Its ballistics resemble the .458 Winchester Magnum, with a larger diameter bullet; whether this is an advantage remains in dispute.[2]

Commercial rifles are no longer available in .476 Nitro Express except by special order, ammunition is no longer commercially available, and handloading data are scant, the factory load used 75 gr (4.86 g) of cordite under a 520 gr (33.7 g) slug.[2]

See also[]



  1. ^ "Kynoch Ammunition, .476 Westley Richards". Archived from the original on 2014-11-11. Retrieved 2014-11-11.
  2. ^ a b c d Barnes & Amber, p 229.
  3. ^ Wieland.