.460 Steyr

The .460 Steyr (11.6×90mm Grillmayer) is a center fire cartridge from the weapons manufacturer Steyr Mannlicher, which was developed for sniper rifles. During the development, important features for the military, such as the penetration power of armor or a tracer, were not taken into account. The cartridge was presented for the first time in February 2004 at the ShotShow-2004 in Las Vegas together with the Steyr HS .50.[1]

.460 Steyr
3D Model of the .460 Steyr cartridge
TypeRifle
Place of originAustria
Production history
DesignerHorst Grillmayer
Designed2002
ManufacturerSteyr Mannlicher
Produced2004–present
Specifications
Parent case.50 BMG
Case typeRimless, bottleneck
Bullet diameter.4579 in (11.63 mm)
Land diameter.4500 in (11.43 mm)
Neck diameter0.5008 in (12.72 mm)
Shoulder diameter0.7205 in (18.30 mm)
Base diameter0.804 in (20.4 mm)
Rim diameter0.804 in (20.4 mm)
Rim thickness0.083 in (2.1 mm)
Case length3.543 in (90.0 mm)
Overall length4.918 in (124.9 mm)
Rifling twist1 in 14
Maximum pressure (C.I.P)53,664 psi (370.00 MPa)
Ballistic performance
Bullet mass/type Velocity Energy
600 gr (39 g) Monolithic 3,000 ft/s (910 m/s) 11,989 ft⋅lbf (16,255 J)

The cartridge was designed by Horst Grillmayer in 2002, while the projectile was designed by Guido Wasser. Production started around 2004 together with the Steyr HS .460. The ammunition was developed for precision rifles for sport shooters, with the focus on the long range and bypassing the 12.7 × 99 mm NATO (.50 BMG) caliber, the use of which is prohibited in many European countries for non-official purposes.[2] The ammunition can also be of interest to armies deployed abroad, which have been banned from using 12.7 mm ammunition in peacekeeping operations.[3]

Overview

The external shape of the .460 Steyr cartridge is very similar to cartridges in the 12.7 × 99 mm caliber, but has a shorter case and a narrower cartridge neck, which leads to increased gas pressure. The ballistic properties of the .460 Steyr and the 12.7 × 99 mm are largely similar.[3]

The ammunition is also comparable to other special cartridges such as the .408 Chey Tac or the .416 Barrett, which were also developed as special calibers for precision rifles in order to be able to work over long distances.[4]

See also

References
  1. Diskussion zum Steyr HS .50 und dem Kaliber .460 Steyr auf thehighroad.org
  2. .460 Steyr Munition auf ammo-one.com
  3. Bericht über das Steyr HS .460 und der .460 Steyr Patrone auf all4shooters.com
  4. Barnes, Frank C.; Woodard, W. Todd (2022). Cartridge of the world (14st ed.).


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