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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.
7mm STW [9] (Shooting Times Westerner) 7.214 (.284) ... Voluntary Industry Performance Standards for Pressure and Velocity of Centerfire Rifle Ammunition for the Use ...
List of rifle cartridges, by primer type, calibre and name. ... 7mm Shooting Times Westerner; 7mm Weatherby Magnum; 7mm Winchester Short Magnum; 7-30 Waters; 7×33mm ...
Designed by Layne Simpson, Editor of Shooting Times magazine, the wildcat status of the 7mm STW ended in 1996 when it got SAAMI certified and became an officially registered and sanctioned member of the 8mm Remington Magnum "family" of magnum rifle cartridges. With top handloads pushing a 150-grain bullet at nearly 3,400 feet per second, it is ...
The 7mm Remington Magnum rifle cartridge was introduced as a commercially available round in 1962, [2] along with the new Remington Model 700 bolt-action rifle. It is a member of the belted magnum family that is directly derived from the venerable .375 H&H Magnum . [ 3 ]
When introduced, it was first chambered in the Winchester Model 70 Westerner rifle, which was intended for longer range shooting more common in the Western United States. At present Remington, Winchester, HSM, and DoubleTap Ammunition produce ammunition for this cartridge. Manufacturers offer a 140 gr (9.1 g) bullet at 3,030 ft/s (920 m/s).
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 cartridge rates higher on the overbore index than the .264 Winchester Magnum and the 7mm Shooting Times Westerner but less than the 7mm RUM and the .30-378 Weatherby Magnum. The consequence of burning a large quantity of powder and driving a bullet faster is poor barrel life and throat erosion all of which affects accuracy and usable life ...