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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
why .308?
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<blockquote data-quote="milanuk" data-source="post: 22276" data-attributes="member: 376"><p>True. IIRC, the NATO chambering is throated for something like 150gr bullets, and most civilian .308s are throated to chamber a wider variety of bullet weights. It is still cut w/ the same *body* reamer, for all intents and purposes, AFAIK.</p><p></p><p>Saying that because one gun is throated short for one bullet makes it a 7.62x51, while another is throated longer makes it a .308, when they have the same case body doesn't make a whole heck of a lot of sense to me. So we have the .223 Remington, as another 'case' in point (pun intended). Chambered short for 40-55 gr bullets, w/ a slower twist, it is a .223 Rem. Crank the twist up to something like 1-8" or 1-9" and feed it 62gr SS109 bullets, and now it is magically a 5.56x45 NATO and no longer a .223 Rem? So what does it become when you crank the twist up to 1-7" and throat it for 90gr JLK bullets? Guess what? It is still a .223 Remington!!</p><p></p><p>For most purposes, .308 Win = 7.62x51NATO, and .223 Rem = 5.56x45NATO. The throats are cut slightly differently, but the case bodies, AFAIK, are different. One is the 'old-fashioned' U.S. designation i.e. .308 or .223, and the other is an international metric designation i.e. 7.62 or 5.56mm.</p><p></p><p>Monte</p></blockquote><p></p>
[QUOTE="milanuk, post: 22276, member: 376"] True. IIRC, the NATO chambering is throated for something like 150gr bullets, and most civilian .308s are throated to chamber a wider variety of bullet weights. It is still cut w/ the same *body* reamer, for all intents and purposes, AFAIK. Saying that because one gun is throated short for one bullet makes it a 7.62x51, while another is throated longer makes it a .308, when they have the same case body doesn't make a whole heck of a lot of sense to me. So we have the .223 Remington, as another 'case' in point (pun intended). Chambered short for 40-55 gr bullets, w/ a slower twist, it is a .223 Rem. Crank the twist up to something like 1-8" or 1-9" and feed it 62gr SS109 bullets, and now it is magically a 5.56x45 NATO and no longer a .223 Rem? So what does it become when you crank the twist up to 1-7" and throat it for 90gr JLK bullets? Guess what? It is still a .223 Remington!! For most purposes, .308 Win = 7.62x51NATO, and .223 Rem = 5.56x45NATO. The throats are cut slightly differently, but the case bodies, AFAIK, are different. One is the 'old-fashioned' U.S. designation i.e. .308 or .223, and the other is an international metric designation i.e. 7.62 or 5.56mm. Monte [/QUOTE]
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why .308?
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