| 词条 | 6mm Optimum |
| 释义 |
| name = | image = 6mm PPC.jpg | image_size = 300px | caption = The 6mm AR (center) is near the "6mm Optimum". | origin = | type = }} The "6mm Optimum" is a concept popularized in 1999 by military writer Stanley C. Crist. HistoryCrist argued for the adoption of a 6mm rifle chambering as a replacement for the venerable 5.56×45mm NATO and 7.62×51mm NATO, calculating that such a loading would be near the weight and minimal recoil of the lightweight 5.56 while nearer the terminal performance of the heavier 7.62, thereby permitting a single caliber to serve in general-purpose machine guns, sniper rifles, and infantry carbines. BallisticsCrist's specifications were that "6mm Optimum" ammunition achieve, with a 100 grain bullet:
...of which he noted, "...even with a conservative estimate for the muzzle velocity of the 6mm Optimum cartridge, computed data for 1200-meter velocity, flight-time, wind-deflection, and trajectory height are all greatly superior to both 5.56 and 7.62 NATO rounds."[1] See also
References1. ^{{cite journal|last1=Crist|first1=Stanley C.|title=Is 6mm The Optimum Caliber? A Common Cartridge for Rifle and Machinegun|journal=Infantry, Sept-Dec. 1999 |volume=72|number=3 |url=http://webcache.googleusercontent.com/search?q=cache:GbNZdhiPnzMJ:www.benning.army.mil/infantry/magazine/issues/1999/SEP-DEC/pdfs/SEP-DEC99.pdf|accessdate=June 19, 2017}} 1 : Pistol and rifle cartridges |
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