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Old 06-10-2011, 08:24 PM   #1
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Default Can you fire a 7.62x36 on a .308 rifle?

Crazy hypothetical question.

If you have a .308 rifle but out of ammo except some 7.62x36 you see laying around. Can you and will you load and fire that ammo in your .308 rifle if your life depends on it?



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Old 06-10-2011, 08:55 PM   #2
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x39?, No......



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Old 06-10-2011, 10:19 PM   #3
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No. .308 Winchester is 7.62 x 51mm long, and the other is 7.62 x 39m long.

Either the round will push so far into the chamber that the firing pin never hits, OR, if the extractor grabbed it and is holding it, headspace will suck HUGELY, shoulder will blow out, possibly leaving part of a ruptured case in chamber.

ALSO- Commies measure bore diameters differently than US. THEIR 7.62 is more like .311 or .312, not .308. Higher pressures IF it fires.

All in all, bad ju-ju. But if you want to try it- can I have your guns?

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Old 06-10-2011, 10:21 PM   #4
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Go out to the kitchen.
Get out the biggest, baddest knife you can find.
There you go.
It isn't as apt to blow up in your face.

(Walks away shaking head. Who would burn up the very last of his ammo, leaving himself with an ornate club for defense?)

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Old 06-10-2011, 10:33 PM   #5
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Quote:
Originally Posted by c3shooter View Post
No. .308 Winchester is 7.62 x 51mm long, and the other is 7.62 x 39m long.

Either the round will push so far into the chamber that the firing pin never hits, OR, if the extractor grabbed it and is holding it, headspace will suck HUGELY, shoulder will blow out, possibly leaving part of a ruptured case in chamber.

ALSO- Commies measure bore diameters differently than US. THEIR 7.62 is more like .311 or .312, not .308. Higher pressures IF it fires.

All in all, bad ju-ju. But if you want to try it- can I have your guns?
Bore size is probably the only reason I can understand why one shouldn't try it given this "YOUR LIFE DEPENDS ON IT" scenario where you don't care about the gun or anything else because you will most likely die if you don't do anything.

Better to use the rifle as a club then huh?
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Old 06-10-2011, 11:21 PM   #6
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Quote:
Originally Posted by Poink88 View Post
Bore size is probably the only reason I can understand why one shouldn't try it given this "YOUR LIFE DEPENDS ON IT" scenario where you don't care about the gun or anything else because you will most likely die if you don't do anything.

Better to use the rifle as a club then huh?
Grab the knife and run! Take the rifle also. Chances are you will find like minded people.
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Old 06-11-2011, 12:56 PM   #7
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Even though the bullet is larger than the .308 bore, the extra 12 millimeters of chamber space will allow the pressures to remain tolerable. There is a chance if sticking the bullet in the barrel (squib load) if the bullet is particularly tough (like a Chicom steel core bullet) as it will resist swaging down to bore diameter more than a lead core bullet.



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