The 7mm Winchester Short Magnum (also known as the 7mm WSM) is a centrefire cartridge developed in partnership with Browning Arms Company and Winchester ammunition, making its debut and introduced to the shooting public in 2001. It is a member of the Winchester Short Magnum family of cartridges.
The 7mm WSM is similar to the .300 WSM with the case necked down to handle .284" bullets. However, the distance from the case head to the datum line on the shoulder is longer for the 7WSM, preventing accidental chambering or firing of the .284" 7mm bullet in .270 WSM's .277" bore.
Performanceedit
The 7mm WSM cartridge achieves its useful purpose as an excellent cartridge for larger mule deer, sheep, black bear and elk.
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]
Popularityedit
The 7mm WSM has failed to gain the same popularity as the other cartridges in the WSM family. Some people erroneously believe the short case necks make the 7mm WSM poorly suited to heavier bullets, limiting the cartridge's usefulness on larger game. It is no different in this respect than the popular 300 Winchester Magnum. [3]
Cost is another factor limiting popularity. Ammunition prices are higher than those of the 7mm Remington Magnum and the .280 Remington,[4] both of which have similar performance to the 7mm WSM, with the 280 Rem having slightly less muzzle energy and the 7mm Rem Mag being roughly equal. [5]
winchester, short, magnum, also, known, centrefire, cartridge, developed, partnership, with, browning, arms, company, winchester, ammunition, making, debut, introduced, shooting, public, 2001, member, winchester, short, magnum, family, cartridges, winchester, . The 7mm Winchester Short Magnum also known as the 7mm WSM is a centrefire cartridge developed in partnership with Browning Arms Company and Winchester ammunition making its debut and introduced to the shooting public in 2001 It is a member of the Winchester Short Magnum family of cartridges 7 mm Winchester Short MagnumWSM and WSSM family of cartridges From left to right 223 WSSM 243 WSSM 25 WSSM 270 WSM 7 mm WSM 300 WSM 325 WSM TypeRiflePlace of originUnited StatesProduction historyDesignerWinchesterDesigned2001Produced2001 presentSpecificationsParent case 300 Winchester Short MagnumCase typeRebated rimmed bottleneckBullet diameter0 284 in 7 2 mm Land diameter0 277 in 7 0 mm Neck diameter0 321 in 8 2 mm Shoulder diameter0 538 in 13 7 mm Base diameter0 555 in 14 1 mm Rim diameter0 535 in 13 6 mm Case length2 100 in 53 3 mm Rifling twist1 turn in 9 5 Primer typelarge rifle magnumBallistic performanceBullet mass type Velocity Energy160 gr 10 g 3 050 ft s 930 m s 3 304 ft lbf 4 480 J Source s Winchester 1 Contents 1 Specifications 2 Performance 3 Popularity 4 See also 5 ReferencesSpecifications editThe 7mm WSM is similar to the 300 WSM with the case necked down to handle 284 bullets However the distance from the case head to the datum line on the shoulder is longer for the 7WSM preventing accidental chambering or firing of the 284 7mm bullet in 270 WSM s 277 bore Performance editThe 7mm WSM cartridge achieves its useful purpose as an excellent cartridge for larger mule deer sheep black bear and elk 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 Popularity editThe 7mm WSM has failed to gain the same popularity as the other cartridges in the WSM family Some people erroneously believe the short case necks make the 7mm WSM poorly suited to heavier bullets limiting the cartridge s usefulness on larger game It is no different in this respect than the popular 300 Winchester Magnum 3 Cost is another factor limiting popularity Ammunition prices are higher than those of the 7mm Remington Magnum and the 280 Remington 4 both of which have similar performance to the 7mm WSM with the 280 Rem having slightly less muzzle energy and the 7mm Rem Mag being roughly equal 5 See also editTable of handgun and rifle cartridgesReferences edit Winchester load data Barnes Frank C 2006 1965 Skinner Stan ed Cartridges of the World 11th ed Iola WI USA Gun Digest Books ISBN 0 89689 297 2 Short Magnums Factory Ammunition Prices 7mm Winchester Short Magnum 7mm Cartridge Guide 7mm WSM section nbsp This ammunition related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title 7mm Winchester Short Magnum amp oldid 1161632452, wikipedia, wiki, book, books, library,
