|
The 9.3x64mm Brenneke (also unofficially known as the 9.3 x 64) is a rimless bottlenecked centerfire cartridge developed for big-game hunting. The 9.3 denotes the 9.3 mm bullet diameter and the 64 denotes the 64 mm case length. Using the bullet diameter is unusual in German cartridge designations. Normally the approximate land diameter of the barrel is used for such designations. The 9.3x64mm Brenneke can be chambered in standard-sized Mauser 98 bolt action rifles. The M 98 bolt actions and magazine boxes of standard military Mauser 98 rifles, however, have to be adapted by a competent gunsmith to function properly with these magnum cartridges since their cases are longer and have a larger diameter than the 8x57mm IS service cartridges. ==History== One of the most successful cartridge designs of the famous German gun and ammunition designer Wilhelm Brenneke (1865–1951) was the 9.3x64mm Brenneke. He designed this cartridge de novo (the 9.3x64mm Brenneke has no other cartridge as parent case) and introduced it commercially in 1927. This big-game cartridge is the most powerful cartridge he designed. The 9.3x64mm Brenneke was designed to have the largest possible case capacity without any shape or dimensional drawbacks that would hamper its chambering and perfect functioning in Mauser Gewehr 98 rifles that were then standard issue in the German military. The widespread availability of standard-size Mauser 98 rifles in central Europe and the fact that the .375 Holland & Holland Magnum cartridge and its necked-down version the .300 Holland & Holland Magnum with approximately 72.4 mm case length were too long to fit in standard-sized Mauser 98 bolt action rifles made the shorter 9.3x64mm Brenneke an interesting chambering option for European big-game hunters. Brenneke introduced the 9.3x64mm Brenneke with a 19.65-gram (303 gr) Torpedo Ideal Geschoss (TIG – Torpedo Ideal projectile) designed for big game and a 17-gram (262 gr) jacketed bullet with lead, bronze or a copper tip for smaller game. Later a special TIG with a bronze tip and a full metal jacket bullet where added for thick skinned dangerous game. After that Brenneke developed a 19-gram (293 gr) Torpedo Universal Geschoss (TUG – Torpedo Universal projectile) with a lead tip that is still produced. In 2009, the Russian military developed the semi-armour-piercing 9SN cartridge for the 9.3x64mm Brenneke SVDK variant of the Dragunov sniper rifle. This cartridge has a 16.6 g (256 gr) pointed boat-tailed FMJ bullet with steel core and achieves a muzzle velocity of 770 m/s (2520 ft/s). The 9SN cartridge should be able to defeat body armour at ranges up to 600 metres (660 yd).〔(Ammunition (cartridges) for rifles and machine guns )〕 The 9.3x64mm Brenneke ballistic performance is on par with the .375 Holland & Holland Magnum while being smaller and using less propellant - it has 8% less case capacity, making it a more modern, efficient design. With the official certification of the 6.5 x 63 Messner Magnum this German 64 mm "family" of magnum rifle cartridges that all share the same basic cartridge case got expanded 71 years later. The cartridges in this German 64 mm cartridge "family" are, in the order of development: * 9.3x64mm Brenneke (1927) * 6.5 x 63 Messner Magnum (2002) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「9.3×64mm Brenneke」の詳細全文を読む スポンサード リンク
|