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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.
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 ...
This is a list of firearm cartridges which have bullets in the 7.00 to 7.99 millimetres (0.2756 to 0.3146 in) caliber range. Length refers to the cartridge case length. OAL refers to the overall length of the cartridge.
Rimfire ammunition is a type of metallic cartridge whose primer is located within a hollow circumferential rim protruding from the base of its casing. The most common rimfire cartridges are chambered for .17 caliber and .22 caliber .
This process (which allows the cartridge to contain more propellant and thus increases the potential energy of the bullet) was used to make the powerful .357 Magnum cartridge from the much weaker .38 Special: A .357 magnum bullet has more than 3 times more energy than a .38 special bullet of the same weight. Increasing the length of a bullet's ...
The Bureau of Alcohol, Tobacco, Firearms and Explosives said whoever stole the ammunition could be trying to sell it to gun dealers. ‘Large quantities’ of 9mm bullets stolen from shipping ...
Winchester claims a muzzle velocity (MV) of 3,225 ft/s with a 140 grain bullet for their 7mm WSM cartridge; the claimed muzzle energy (ME) is 3,233 ft. lbs. With a 160 grain bullet the Winchester figures are 2990 ft/s and 3176 ft. lbs. at the muzzle. The lighter, shorter 7mm bullets are preferred in these short case magnums. [2]
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.