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SOCOM II .308 Winchester ammo?

This is a discussion on SOCOM II .308 Winchester ammo? within the Modern M14 forums, part of the M14 M1A Forum category; I apologize in advance for such an elementary question, but just got my new SOCOM II in. This is my first battle-type rifle, and first ...


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Old April 14th, 2010, 11:41 AM   #1
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SOCOM II .308 Winchester ammo?

I apologize in advance for such an elementary question, but just got my new SOCOM II in. This is my first battle-type rifle, and first in .308 caliber. I was always under the impression that 7.62 NATO and .308 Winchester were interchangeable.
But before I do something really stupid, I surfed the net a little and found quite a bit of stuff from "gun writers" (whatever that's worth) about how they are NOT the same and .308 WIN develops higher pressures. But I see a lot about using .308 WIN in the SOCOM, and several suggestions about Hornady's TAP ammo. Can some of you guys who actually shoot a lot (as opposed to only write articles) give me some guidance before, like I said, I do something stupid? .308 WIN okay in the SOCOM?

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Old April 14th, 2010, 12:47 PM   #2
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They are actually chambered for .308 - I remember seeing it stamped on the bottom of my barrel somewhere. I shoot everything through mine with no problems

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Old April 14th, 2010, 12:57 PM   #3
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This has been discussed a lot on this forum and you can do a search for the conversations. You can also call or e-mail Springfield and verify with them the info about your rifle's chamber but my impression is that Springfield cuts their chambers so that they can fire either 7.62 or .308.

In general you can usually use .308 rounds in a Springfield M1A platform as long as you do not use one of the newer "magnum" or high velocity cartridges. The chamber of the M1A style rifle is designed to handle about 50,000 - 55,000 PSI which is lower than the maximum standard specified by SAAMI (about 62,000 PSI) for .308 chambers. This means that manufacturers can build cartridges that create higher chamber pressures than the M1A was built to handle but the standard ammo is built to pressures that the M1A can handle.

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Old April 14th, 2010, 04:24 PM   #4
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Originally Posted by RAMMAC View Post
In general you can usually use .308 rounds in a Springfield M1A platform as long as you do not use one of the newer "magnum" or high velocity cartridges. The chamber of the M1A style rifle is designed to handle about 50,000 - 55,000 PSI which is lower than the maximum standard specified by SAAMI (about 62,000 PSI) for .308 chambers. This means that manufacturers can build cartridges that create higher chamber pressures than the M1A was built to handle but the standard ammo is built to pressures that the M1A can handle.
I've never heard it explained that way... now I understand!

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Old April 14th, 2010, 05:01 PM   #5
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Commercial .308 loads pushing heavy bullets (180 gr or heavier) could cause problems but you should be OK with any NATO-stamped 7.62 ammo and even new American factory .308 shooting 150 gr. bullets. OK, cheat a little and shoot the 165 gr GameKing if you wanna kill a deer or a hog.

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Old April 14th, 2010, 05:17 PM   #6
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+1 on RAMMAC's post - standard .308 fine, just avoid magnum loads as well as bullet weight much beyond 168gr.

I have over 2000 rounds through my SOCOM II and while most of that has been MILSURP 7.62 plenty of it has been .308. When I first bought my rifle in addition to this forum I called SAI direct for any of their input on ammo suggestions. First of all they stated that all their M1A models are chambered with a headspace that will function with both 7.62 and .308 alike. There are definitely a number of rifles, predominantly bolt/hunting models chambered for .308 only that should not use 7.62 rounds. So yes you can shoot both in your Deuce; no worries.

What I feed mine the most is British Radway green (7.62 NATO MILSURP) from Southern Ohio Gun. Opinions vary on accuracy however the Winchester White Box made to 7.62x51 NATO specs works just fine for me when the price is right; bought a ton from Cabelas at $11.99/box over a year ago, not sure where availability and price is at the moment (but check out the ammo thread on the forum for that). In regard to the Hornady TAP ammo it's pricey, but I have shot through 10 boxes of the LEO (red box) that they have in stock at www.ammunitiontogo.com and have a good amount of that stocked up in my safe (100 of the 110 and 100 of the 155gr. I almost got lyched in the ammo forum after admitting that (cost/waste of ammo thing).

A quick note on the LEO (Law Enforcement Only) ammo such as the Hornady LEO/TAP I just mentioned, Winchester Lawman, etc. I was leary about, especially on the internet, buying something labled LEO cuz that's what I need is some infraction of the law buying cop only ammo and online no less! So I called Hornady customer service and basically it is legal for an ammo dealer to sell to non-law enforcement, and it is legal for civilian purchase. The design is "intended" for and the sell is "intended" for the police, but it's more of a marketing thing. So there is no illegality and the LEO TAP ammo is actually cheaper than the FPD version because it doesn't have the cool looking coating on the cartridge case that the TAP FPD does. However the LEO TAP is match ammo so the brass cases are highly polished...darn near slippery. Last comment - try to keep the bullet weight of whatever you buy between the 145gr-168gr. Heavier bullets generate more pressure and the jury is out on reliable cycling with the lighter bullets. A contradiction to that is that the SOCOM's do like the TAP 110gr just fine. I had been told that and while many argue not to use it I have a good amount of the LEO TAP 110gr and have put 100 rounds of that expensive schtuff through my deuce to ease my mind after all the debates that it "shouldn't" cycle reliably with the light load. FWIW no paper involved except for one 5-shot group to settle curiosity (very accurate) every other one of those beauty's hit some type of large fruit, water jug, etc and at near 3200fps them little 110gr hollow points put on quite a show

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Old April 15th, 2010, 06:43 AM   #7
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I've used the Winchester 148 gr with good results in my Socom 16.

The hornady is awesome ammo and is much more accurate than the winchester. Also with the Hornady you hardly have to clean the rifle.

After 200 rds of Hornady ammo I ran a cleaning patch down the barrel and there was just the slightest amount of carbon on it. Very clean ammo.

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Old April 15th, 2010, 07:06 AM   #8
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Good post 8 Ball ........

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Old April 15th, 2010, 08:26 PM   #9
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Originally Posted by Daddy8BallDeep
; A contradiction to that is that the SOCOM's do like the TAP 110gr just fine. I had been told that and while many argue not to use it I have a good amount of the LEO TAP 110gr and have put 100 rounds of that expensive schtuff through my deuce to ease my mind after all the debates that it "shouldn't" cycle reliably with the light load. FWIW no paper involved except for one 5-shot group to settle curiosity (very accurate) every other one of those beauty's hit some type of large fruit, water jug, etc and at near 3200fps them little 110gr hollow points put on quite a show
I've got 100rds of the 110gr in the safe, 40 of it loaded into mags for the Socom16. I would think the lighter HP bullet wouldn't go through as much wood and drywall as a 150grn FMJ. I did fire 20 rounds of it for function and accuracy, all was well.

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Old April 16th, 2010, 01:11 PM   #10
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Good post 8 Ball ........
Thank you

I wanted to mention it, I can't remember where it was in the vast TFL forum, but I saw a post that Cheaper Than Dirt (usually not my favorite place) had a good deal on DAG Milsurp. Well I was about to order 500 rds from AmmoMan for $269 delivered but after reading that checked CTD last night and ordered 3-200rd battlepacks for $85 each! Doing the math on total cost versus what it was for 500 rounds I got the extra 100 roounds for $17 Thanks to the original poster I saved a heap. I wish I coulda bought more.

So HuntNFam - if you wanna break in your rig fer cheap there ya go!

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Old April 16th, 2010, 01:22 PM   #11
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I've got 100rds of the 110gr in the safe, 40 of it loaded into mags for the Socom16. I would think the lighter HP bullet wouldn't go through as much wood and drywall as a 150grn FMJ. I did fire 20 rounds of it for function and accuracy, all was well.
Charlie - check this out: http://www.hornadyle.com/products/mo...2&sID=79&pID=1 and then check out the other bullet weights. Each one shows a ballistics gel profile. The TAP 110 total penetration is 9.25" then the 165gr "Barrier" round is 20+" Coincodentally I keep 1 20rd mag loaded up with the 110 as well for a Plan-B (or C) deal. There is a lot of good information in their site including a lengthy document on the development of the line. The author says a hunting buddy intentionally shot a deer in the shoulder and it dropped...as in never took one step. I would not consider it for hunting because it would frag on a blade of grass most likely; but in the context of the study it was interesting.

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