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AR10 ammo issue...PLEASE HELP!!

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AR10 ammo issue...PLEASE HELP!! was created by Smitty_nct

Please tell me I'm ok and don't have anything to worry about.... My Armalite AR10 has 7.62 stamped on the receiver, and I have already put about 150 rounds of .308 Win through it. Can I continue shooting the .308 Winchester ammo or switch to 7.62 only and stay with that?
9 years 5 months ago #42964

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Replied by Siscowet on topic AR10 ammo issue...PLEASE HELP!!

You are fine with either one. Don't worry about it. It is not like the .223/5.56 issue, where if it says .223 you have to use 223 and not 5.56.
9 years 5 months ago #42967

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Replied by Smitty_nct on topic AR10 ammo issue...PLEASE HELP!!

Thanks Siscowet. I checked the FAQ's on Amalites website and they said the same thing.

SCHEWWWE!!! Thought I had done screwed up fer sure!!!
9 years 5 months ago #42968

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Replied by Siscowet on topic AR10 ammo issue...PLEASE HELP!!

It can be confusing.
I reload a lot, and I run 7.62 brass through a .308 die and it shoots accurately with no problem, so I don't think the differences are big. If I remember correctly, some 308 loads have higher pressures than 7.62 rounds, but I have never heard any factory warnings.
The Armalite website for FAQ's is a really handy resorce. So also is there technical bulletin library. I learned a lot by reading those. So how is your Armalite shooting?
9 years 5 months ago #42969

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Replied by Smitty_nct on topic AR10 ammo issue...PLEASE HELP!!

FRIGGIN AWESOME!!! I dialed it in with the Hornady 150 grain SST rounds. I can cover up the group with a quarter at 100 yards. She is dialed in for 200. Now I'm just waiting for our rifle part of deer season to open.
9 years 5 months ago #42976

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Replied by Siscowet on topic AR10 ammo issue...PLEASE HELP!!

Good to hear. Share some pics if you nail a buck. Good luck.
9 years 5 months ago #42980

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Replied by dickn52 on topic AR10 ammo issue...PLEASE HELP!!

It's a SAMI thing about pressures and all. 7.62 might be a hotter load depending, but if it's off the shelf, then .308 is generally softer shooting than 7.62 NATO stuff. Cartridge wise they are identical except for wall thickness of the case.
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9 years 5 months ago #43018

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Replied by Akai on topic AR10 ammo issue...PLEASE HELP!!

Depending on what brass we are talking about it all is different first rule measure case wall thickness.
AKAI
9 years 5 months ago #43075

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Replied by Lizardette on topic AR10 ammo issue...PLEASE HELP!!

Ok, minor correction here Sisco:

The cartridges are not loaded to different pressure levels. The shorter throat on the .308 spec chambers *may* cause a spike in chamber pressure when the bullet from a 7.62 NATO loaded cartridge jams into the rifling sooner than it would in a NATO spec chamber.

Even then, the spike in pressure isn't generally enough to cause a problem unless your bolt lugs are already cracked or there's something else seriously wrong.
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9 years 5 months ago #43080

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