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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 05-20-2013, 8:00 PM
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Default 308 Mil Spec v. Commercial

I have been offered some free .308 that was provided to a sniper who doesn't snipe any more, and thus has no use for it.
It was issued by the (US) government.
I thus assume it is mil spec.
I would only use it in my Savage 11/111 Trophy Hunter. Which should use commercial grade.
I have heard of some controversy that the mil spec has a different cartridge wall or something that may change the pressure.
Would it be ok for me to use that, or not?
Thanks
dc
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  #2  
Old 05-20-2013, 8:19 PM
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Generally it is OK to shoot 7.62 in a 308 chambered rifle. More likely to encounter issues going the other way.

Do you know the military designation (e.g. M852) of the ammunition? The weight and load may differ for true sniper rounds.
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  #3  
Old 05-21-2013, 1:56 PM
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Thanks mil
That is about the same I found here.
http://thefiringline.com/forums/showthread.php?t=525226
There is a link to a rather scholarly and informative paper on the topic.
dc
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Old 05-21-2013, 2:00 PM
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308 is commercial and 7.62x51 is the mil spec stuff
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Old 05-21-2013, 2:38 PM
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^ you sir are a genius.
Do tell us more
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Old 05-21-2013, 2:39 PM
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PS. Op, best bet is contact Savage and see what they say. Nobody would know more about their chambers than them.
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Old 05-21-2013, 2:40 PM
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Quote:
Originally Posted by MrPlink View Post
^ you sir are a genius.
Do tell us more
LOL
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  #8  
Old 05-21-2013, 4:57 PM
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Plinkie
That actually sounds like a good idea. I will see if I can send an email for an 'official' answer.
dc

Edit:
Plinkie
(I hope you don't mind me calling you Plinkie)
It was easier than that.
Savage has commonly asked questions on their website. This is what they say:
"Savage Arms does not recommend the use of any military surplus ammunition. As stated in the owner's manuals, you should only shoot the caliber that is stamped on the side of your barrel."
It's marked .308 Win
Mil spec is 762 x 51.
dc

Last edited by David13; 05-21-2013 at 5:06 PM..
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Old 05-21-2013, 5:05 PM
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Just out of curiosity what is the military designation, any LR118?
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Old 05-21-2013, 5:15 PM
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Koda
Post #8 on the firing line (see link above) deals with that question.
dc
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Old 05-21-2013, 5:25 PM
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I'll take it. Bet it will shoot just fine in my M1A.
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Old 05-21-2013, 6:13 PM
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Mr. Pimp, Will you please be so kind to bestow upon us your vast wealth of firearm knowledge that us heathens are ignorant of? .308 and & 7.62x51 are generally thought to have the same exterior dimension though double check with saammi on that. The major difference between the two is 7.62 has thicker brass so it can withstand out of spec, or unusual chambers often encountered in military firearms (blowback MG, fluted chamber, strange operating system, etc.) but, it also ,means less case capacity than the .308.
It's in reloading that ya gotta worry about 7.62 brass causing high pressure when using loads made for .308.

Some words for a pimp to grow on.
"Even a fool, when he holds his peace, is counted wise: and he that shuts his lips is esteemed a man of understanding."-Proverbs 17:28
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  #13  
Old 05-21-2013, 6:14 PM
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OldShooter
He told me to let someone else have it if I couldn't use it. He's in Marin county.
Maybe he will let you have it.
I'm not scheduled to see him again til September and I don't think he really wanted to ship it.
I sent him a link to this thread. We will see if he responds.
I'm sure it would shoot fine in a M1A, if ... it is chambered in 7.62x51.
If I couldn't or wouldn't use it I would be happy to pass it on or have it passed on to someone who would use it.
dc
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Old 05-21-2013, 6:52 PM
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Quote:
Originally Posted by The Paper Pimp View Post
308 is commercial and 7.62x51 is the mil spec stuff
LOL!!!!!!!!!!!!!!!!

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  #15  
Old 05-26-2013, 2:50 PM
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Well.
Out at Burro Canyon today someone was inquiring who was shooting .308 and was referred to me.
He had CBC 762 51 and it was next to impossible to eject. The bolt was jamming on it.
I let him try 2 of my PMC .308 Win. No problem, easy eject.
The only thing I could tell him was that he had mil spec and ...
Therefore ... ergo ...
I do notice also that there was a recall on CBC and that it is ... MagTech.
I have seen posts about MagTech. Not good ones.
Up in Beaver Utah last week they tried to sell me MagTech. They highly praised it, and asked me what problem I had with it. Not I says me, but others have posted that it jams.
So what did this guy have?
dc
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Old 05-26-2013, 8:36 PM
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Quote:
Originally Posted by David13 View Post
OldShooter
He told me to let someone else have it if I couldn't use it. He's in Marin county.
Maybe he will let you have it.
I'm not scheduled to see him again til September and I don't think he really wanted to ship it.
I sent him a link to this thread. We will see if he responds.
I'm sure it would shoot fine in a M1A, if ... it is chambered in 7.62x51.
If I couldn't or wouldn't use it I would be happy to pass it on or have it passed on to someone who would use it.
dc
Oh hell, I'll take it! I love that stuff. My old Winchester Model 70 in .308 did too.

Is it M118 or M118LR? M118 is FMJ and M118LR has the match hollow point bullet.

BTW I'm sure it would be fine in a Savage. They worry about liability so they recco against anything that's not SAAMI .308 but they test their guns to proof pressures that's way over 7.62 pressure.

Last edited by sigstroker; 05-26-2013 at 8:39 PM..
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