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Overbore cartridges are those with a relatively large case volume or case capacity, coupled with a relatively small diameter bullet.. The case volume or case capacity and barrel bore area can be mathematically related to obtain a case volume to bore area ratio in metric or imperial units.
Cartridge, Caliber 5.56 mm, High Pressure Test (HPT), M197 [stannic-stained or nickel-plated case]: High-pressure Testing cartridge used when proofing weapons during manufacture, test, or repair. Cartridge, Caliber 5.56 mm, Dummy, M199 [No primer, Fluted case] : 5.56×45mm inert cartridge with fluted indentations in the case.
The case capacity of different cartridge brands of a particular chambering can significantly vary between cartridge case manufacturers and even production lots. The default database of QuickLOAD for example contains 5 different .300 Winchester Magnum case capacities for 5 different cartridge case manufacturers.
The WSM case was designed to be loaded with .30 calibre (7.62mm) bullets. An aspect of the short, fat cartridge design is that it has a narrower acceptable calibre range than a longer cartridge case. It was for this reason that Winchester introduced the WSSM cartridge case to load sub .27 calibre (6.8mm) bullets.
It is a beltless, rebated rim cartridge, capable of handling all large North American game, as well as long-range shooting. Among commercially produced .30-caliber rifle chamberings, the .300 Remington Ultra Magnum is second only to the .30-378 Weatherby Magnum in cartridge-case capacity.
Case capacity: 42.7 gr H 2 O (2.77 cm 3) ... Arguably it is a better overall cartridge for hunting than the more popular .30-30, ...
In January 2017 Nosler introduced the .22 Nosler. It is the fifth cartridge designed by Nosler. It is claimed that the .22 Nosler delivers 25% more case capacity and is nearly 90 m/s (300 ft/s) faster than a .223 Remington/ 5.56 NATO. The .22 Nosler is designed to use the existing bolt face of an AR-15, and conversions to this caliber can be ...
This allows the cartridge to have a greater case capacity than a belted magnum case given cases of equal length. As Ruger intended the cartridge to be chambered in short-length bolt-action rifles, [4] the case length was shortened to 2.10 in (53 mm), which is similar to the .308 Winchester case. Unlike Winchester Short Magnum cartridges, the ...