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tmbipa57

Hello from New Jersey

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Glad this AR-10 forum was created!  I'm new to rifles since you can't hunt with rifles in NJ.  But I decided to buy one and bought a DPMS LR-308 chambered with a 7.62x51 NATO barrel. 

I'm excited to go zero in the scope but my biggest concern with this firearm is the interchangeability of .308 vs 7.62x51 NATO rounds.  I've read numerous articles on this but some articles say a 7.62x51 NATO can be fired in a chambered .308, but a .308 cannot be fired in a chambered 7.62x51.  Is the interchangeability based on equal grain capacity of 147/149 between the two?  7.62x51 are harder to find than .308's in my area. I called on one local shop and as soon as I said 7.62 they immediately said "Oh, 308's".  I do not want to have the wrong ammunition in the chamber.

Any help or advice would be greatly appreciated to put this to rest once and for all.  I figure the best experience / advice with this firearm is found right here. 

Thanks in advance.

tmbipa57

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Welcome aboard from Maryland.

You'll be fine with either round. That usually only applies to much older rifles. The modern AR's can handle both.

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So modern metallurgy will give you some flexibility. While it is higher pressure you may get away with some rounds.... but I would wait until you’re broken in first. Look for m80 ball if you can find it. Others will chime in here but I think it’ll be unanimous 

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16 minutes ago, tmbipa57 said:

I didn't get all that Armed Eye Doc.  "What they said?"

While you are breaking in the gun, shoot 7.62x51 NATO ball ammo if you can find it.  Long-term, 308Win ammo will be just fine in a modern weapon. 

My "∆∆∆∆" was supposed to be arrows indicating that I agreed with the prior responses.

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3 hours ago, Rsquared said:

Welcome aboard from Maryland.

You'll be fine with either round. That usually only applies to much older rifles. The modern AR's can handle both.

Thanks for that confirmation.

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2 hours ago, Armed Eye Doc said:

While you are breaking in the gun, shoot 7.62x51 NATO ball ammo if you can find it.  Long-term, 308Win ammo will be just fine in a modern weapon. 

My "∆∆∆∆" was supposed to be arrows indicating that I agreed with the prior responses.

Oh, okay with the message board jargon lol. Thanks for that advice / guidance Doc!

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Welcome from the REZ you will be fine I have the same rifle and shoot 308 and ball 7.62x51 all the time it likes them both but 168 is it's favorite snack with the 175 next.

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3 hours ago, RedRiverII said:

Welcome and get ready for some fun.  I shot at CNJR&PC for several years.  It's a terrific range.

Thanks for the welcome.  Central Jersey Rifle and Pistol Club is an outstanding range.

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3 hours ago, RedRiverII said:

Welcome and get ready for some fun.  I shot at CNJR&PC for several years.  It's a terrific range.

Thanks for the welcome.  Central Jersey Rifle and Pistol Club is an outstanding facility!

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Glad to hear you enjoy it.  I miss the place.  We have a range with similar activities but it's a two hour drive for me.  CJRPC was only 20 minutes away.  Is John still running the High Power matches?

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