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Rifles, Bullets, Barrels & Ballistics Applied Ballistics


why .308?

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Unread 03-31-2002, 02:17 PM
Gold Member
Join Date: Jan 2002
Location: Wenatchee, WA
Posts: 806
Re: why .308?

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.

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Unread 03-31-2002, 03:20 PM
Bronze Member
Join Date: Mar 2002
Location: Morton, PA.
Posts: 49
Re: why .308?

Magnum rounds are less desirable for snipers due to ease of chambering the round. Belted cases can be harder to operate the bolt on.

In capable hands the .308 is able to shoot sub 1/2" groups at 300 meters. So as a snipers short range (under 800 meters) caliber it is very accurate. Combine this with the availabilty in the field of ammo, and you have a good reason to stick with it.

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Unread 04-01-2002, 12:23 AM
Platinum Member
Join Date: May 2001
Location: Windham, CT - in Moo-Cow country
Posts: 1,006
Re: why .308?

The chambers are not the same... the .308 has a longer throat because of the loong 200gr round nosed bullet.
The 7.62 has a shorter throat (if done properly!)

Spring has sprung, da' creek has riz, I wonder where dem kitties is? Here, kitty kitty kitty.

LRH member #23

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