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In 1966, a man in Iowa named Dennis Hoegh invented a vacuum-formed plastic, hard-shell gun case. Hoegh soon made a deal with Marble Arms that included a generous relocation package, opening a brand new vacuum-formed plastic factory in Gladstone later that year. Marble's deal ended soon after, leaving Hoegh with a factory full of expensive ...
This process produces a thin, hard shell (between 0.25 and 0.75 mm; 0.0098 and 0.0295 in) that is harder than the one produced by carburizing, and can be completed in 20 to 30 minutes compared to several hours so the parts have less opportunity to become distorted. It is typically used on small parts such as bolts, nuts, screws and small gears.
The 20-pounder Parrott rifle fired case shot (shrapnel), shell, and canister shot. The use of bolts (solid shot) was rare and it was usually not provided in the ammunition chests. Firing a shell without a fuse would achieve the same result as firing a solid shot from a rifled gun. [15] Parrott ammunition was designed to be used.
.950 JDJ cases are approximately 70 mm in length, and are based on a 20×102mm Vulcan case shortened and necked up to accept the .950 in (24.1 mm) bullet. Projectiles are custom-made and most commonly weigh 3,600 grains (230 g) which is 8.2 ounces or over half a pound.
In modern solidhead cases, the hardness of the brass is the major factor that determines a case's pressure limit before undergoing plastic deformation. Lapua Ltd. solved this problem when they used the .416 Rigby as the parental case to the .338 Lapua Magnum. They created a hardness distribution ranging from the head and web (hard) to the mouth ...
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One of the more notable examples is the .30 Herrett, a .30-30 case necked back to reduce case capacity for more efficient loading with fast-burning powders. The .30 Herrett produces higher velocities with less powder than the larger .30-30 case in the short 10- and 14-in (25- and 35-cm) Contender barrels.