Belt sleeve

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Belt sleeves: from left: .375 H&H Magnum, .338 Winchester Magnum , quarter dollars for size comparison (24.26 mm)
30 × 113 mm w
30 × 210 mm wide

A belt sleeve ( English Belted Case ) is a sleeve shape in which a belt creates the correct closure distance in front of the extractor groove , it forms the closure distance on the belt shoulder. Belt-case cartridge calibers range from rifle ammunition with 5.56 mm ( .224 Weatherby Magnum ) to military grenade cartridges with 30 mm caliber . The caliber designation is according to a sleeve length B readjusted ( 20 × 138 mm B ), rare in German-speaking G .

history

The first belt cartridge was not the well-known .375 Holland & Holland Magnum , but its predecessor, the .400 / .375 Belted Nitro Express developed in 1905.

technology

The correct locking distance of cartridges is established in different ways - with rim cartridges by the rim, with bottle neck cartridges by the case shoulder, with straight, rimless cases by the case mouth. With belt sleeves, the integrated belt ( English belted case ) in front of the pull-out groove on the sleeve base is used for this.

Belts and rims ensure that the case is positioned on the cartridge base ("positive"), while straight and bottle neck cases are positioned on the case mouth ("negative"). As a result, the sleeve shoulder angle can be made flatter, which makes the charging process easier.

literature

  • Frank C. Barnes: Cartridges of the World. A Complete and Illustrated Reference for Over 1500 Cartridges . 10th edition. Krause Publications, Iola, Wisconsin 2006, ISBN 0-89689-297-2 (American English).

Individual evidence

  1. ↑ a b Michael G. Haag, Lucien C. Haag: Shooting Incident Reconstruction . Academic Press, 2011, ISBN 978-0-12-382241-3 , pp. 389 (American English, limited preview in Google Book Search).
  2. ↑ Form of cartridge cases. In: all4shooters.com. Retrieved October 28, 2017 .
  3. ^ Frank C. Barnes, W. Todd Woodard: Cartridges of the World: A Complete and Illustrated Reference for Over 1500 Cartridges . 15th edition. Gun Digest Books, 2016, ISBN 978-1-4402-4642-5 , pp. 71 (American English, limited preview in Google Book Search).
  4. ↑ Günter Wollert, Reiner Lidschun: infantry weapons yesterday . (1918-1945). In: Illustrated encyclopedia of infantry weapons from around the world . 3. Edition. tape 1 + 2 . Brandenburgisches Verlagshaus, Berlin 1998, ISBN 3-89488-036-8 , cartridges, p. 72 .
  5. ↑ Chuck Hawks: Great Cartridge Families. In: chuckhawks.com. Retrieved September 30, 2017 (English).
  6. ↑ Philip Massaro: Belted Magnum Cases: A Myth Dispelled. In: gundigest.com. July 16, 2014, accessed September 30, 2017 .