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AR10 ammo issue...PLEASE HELP!!

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10 years 2 weeks ago #42964 by Smitty_nct
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?

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10 years 2 weeks ago #42967 by Siscowet
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.

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10 years 2 weeks ago #42968 by Smitty_nct
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!!!

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10 years 2 weeks ago #42969 by Siscowet
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?

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10 years 2 weeks ago #42976 by Smitty_nct
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.

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10 years 2 weeks ago #42980 by Siscowet
Replied by Siscowet on topic AR10 ammo issue...PLEASE HELP!!
Good to hear. Share some pics if you nail a buck. Good luck.

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10 years 1 week ago #43018 by dickn52
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.
The following user(s) said Thank You: jtallen83

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10 years 6 days ago #43075 by Akai
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.

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10 years 6 days ago #43080 by Lizardette
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.
The following user(s) said Thank You: jtallen83, Siscowet

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