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The 7mm Shooting Times Westerner, sometimes referred to as the 7mm STW, began as a wildcat rifle cartridge developed by Layne Simpson, Field Editor of Shooting Times, in 1979. [3] It is an 8mm Remington Magnum case that has been "necked down" (narrowing the case opening) by 1 mm to accept 7 mm (.284 in) bullets.
An overview of 7mm caliber cartridges, their history, and uses in firearms.
Download as PDF; Printable version; In other projects ... Table of handgun and rifle cartridges; ... This page was last edited on 22 March 2022, ...
A guide to the recoil from the cartridge, and an indicator of bullet penetration potential. The .30-06 Springfield (at 2.064 lbf-s) is considered the upper limit for tolerable recoil for inexperienced rifle shooters. [2] Chg: Propellant charge, in grains; Dia: Bullet diameter, in inches; BC: Ballistic coefficient, G1 model; L: Case length (mm)
7 mm Remington cartridges are all rifle cartridges with bullets of 7 millimetres (0.28 in) diameter developed and sold by Remington. These cartridges include: .280 Remington (7mm Express Remington) 7mm BR Remington (Bench Rest) 7mm Remington Magnum; 7mm Remington Ultra Magnum (RUM) 7mm Remington Short Action Ultra Magnum (SAUM) 7mm-08 Remington
The 7mm RUM was created using the .404 Jeffery case [citation needed] which was also used to develop the .375 RUM.300 RUM, and .338 RUM [citation needed]. By necking down the .300 RUM to suit the .284 or 7mm projectile, Remington produced a non-belted case with a head diameter that is somewhat larger than the belt diameter of the original ...
7mm Remington Short Action Ultra Magnum (SAUM) Type: Rifle: Place of origin: United States: Production history; Designer: Remington Arms Company: Designed: 2002: Manufacturer: Remington: Produced: 2002–present: Specifications; Case type: Rimless, bottleneck: Bullet diameter.284 in (7.2 mm) Neck diameter.320 in (8.1 mm) Shoulder diameter.5347 ...
Care must be taken to confirm what twist rate was used, as the earlier West German 7mm Weatherbys used a 1-in-12 twist vs the faster 1-in-10 twist for those of later manufacture. The 1x12 twist rifles will not stabilize bullets over 150 grains, while the 1x10 twist rifles will stabilize bullets weighing up to 175 grains.