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The 9mm Winchester Magnum, which is also known as the 9×29mm, is a centerfire handgun cartridge developed by Winchester in the late 1970s. The cartridge was developed to duplicate the performance of the .357 S&W Magnum in an auto-pistol cartridge. [2] The first handgun which chambered the cartridge was the Wildey pistol.
A drum magazine is a type of high-capacity magazine for firearms. [1] Cylindrical in shape (similar to a drum), drum magazines store rounds in a spiral around the center of the magazine, facing the direction of the barrel. Drum magazines are contrasted with more common box-type magazines, which have a lower capacity and store rounds flat. [1]
A Beta C-Mag undergoes field testing on an M4 carbine. The Beta C-Mag is a 100-round capacity drum magazine manufactured by the Beta Company. It was designed by Jim Sullivan and first patented in 1987 and has been adapted for use in numerous firearms firing the 5.56×45mm NATO, 7.62×51mm NATO, and 9×19mm Parabellum cartridges. [1]
Patent 5,187,324 was filed by John Ricco of CP Bullets in 1992 for an "improved 9mm cartridge casing" that he called the 9×23mm Super. He had the prototype brass casings made by Winchester Ammunition. They then modified the design slightly and filed it under patent 5,507,232 in 1995.
The copper for the casings was acquired by scrap dealers who supposedly were using it to make brass lipstick cases. [18] They made 9×19mm Parabellum and 7.92×57mm Mauser cartridges. IMI , TZZ , or ת צ ( T Tz , or T'aasiya Tz'vaeet , "Military Industries") Israeli Military Industries – Tel Aviv , Israel .
All of these cases were based on the .404 Jeffery with the rim reduced from .543 inches to fit the .532 inch bolt face for existing magnum rifles. [8] [7] The only known shotgun shells using rebated rims is the Roper repeating shotgun [9] and the 12 Gauge RAS12, specially made for the RAS-12 semi-automatic shotgun. [10]
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The first references to the possible use of polymers in the manufacture of casings come from the early 1950s. One of the earliest is the patent filed by Jack W. Roske in 1950 [1] and the idea was to use a metal cup joined with a polymer shell "that will be converted to gas during the firing phase to assist in propelling the projectile and thereby permit reduction in the use of the propelling ...