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.17 Winchester Super Magnum : ウィキペディア英語版 | .17 Winchester Super Magnum
.17 Winchester Super Magnum, is a rimfire rifle cartridge developed by the ammunition company Winchester in 2012. It descended from the .27 caliber nail gun blank by necking down the blank case to take a .17 caliber (4.5 mm) bullet. Initial loadings will be a 20 grain bullet, delivering muzzle velocities around 3000 ft/s .〔(【引用サイトリンク】title=The 17 Winchester Super Magnum )〕 ==Development== Winchester, in conjunction with Savage, introduced this cartridge at the 2013 SHOT Show. 〔(【引用サイトリンク】title=Savage .17 Winchester Super Magnum Rimfire Rifle – SHOT Show 2013 )〕 The brass case for this round is roughly 50% thicker than the 17 HMR, and the max average internal pressure is 33,000 psi, versus the 17 HMR's 26,000 psi. 〔(【引用サイトリンク】title=World's Fastest Rimfire Round: Winchester .17 Super Magnum )〕
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「.17 Winchester Super Magnum」の詳細全文を読む
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