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Concept
9.3×62mm
Summary
The 9.3×62mm (also known as 9.3×62mm Mauser) is a rimless, bottlenecked rifle cartridge designed in 1905 by German gunmaker Otto Bock. It is suitable for hunting medium to large game animals in Africa, Asia, Europe, and North America. At a typical velocity of 720 m/s (2362 ft/s), its 286 gr (18.5 g) standard load balances recoil and power for effective use at 250m (275 yds) to 300m (328 yds). The C.I.P. Maximum Average Pressure (MAP) for the 9.3×62mm is .
The 9.3×62mm was designed to fit into the Mauser 98 bolt-action rifle. European hunters and settlers in Africa often chose military rifles for their reliability and low cost, but colonial governments in Africa fearful of rebellions often banned military-caliber rifles and ammunition. The 9.3×62mm was never a military cartridge and so never had this problem. Like their military counterparts, Mauser rifles chambered in 9.3×62mm were relatively inexpensive and quite reliable. Because of these factors, 9.3x62mm quickly became popular, and usage of the cartridge became widespread.
The 9.3×74mmR is a rimmed cartridge that evolved from the 9.3×72mmR black powder cartridge. The energy levels of the 9.3×62mm and 9.3×74mmR cartridges are similar, but the cartridges are unrelated. The rimmed cartridge is slightly longer than the 9.3x62mm, allowing for lower pressure in the case while retaining muzzle velocity and energy.
The 9.3×62mm was first loaded with an bullet at a muzzle velocity of 655 m/s (2,150 ft/s). After World War I some companies increased the velocity to around 730 m/s (2,400 ft/s), and brought out lighter bullets. Rifles set up for the original load have their sights readjusted to shoot the newer load to point of aim. Adding to the confusion, loads at both velocities are still available. Several European firms load 9.3×62mm ammunition, including Lapua, Norma, RUAG Ammotec (RWS), SAKO, and Prvi Partizan (PPU) as well as Denel (PMP) of South Africa, and it is widely available in Africa.
In England, Kynoch, the well-known cartridge manufacturer, produced ammunition, referring to the 9.
Official source
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