I asked a few weeks back about firing a 7.62 in a 308. I though since a .223 rifle with 5.56 was a bad idea, but .223 in a 5.56 was ok.

The general thought HERE was a 7.62 shooting 308 was bad, but a 308 firing a 7.62 is ok.

Checking dpms's site for some info about another subject I found a FAQ page that says the total different then the guys I talked to on here.

Not calling anyone wrong, I will be calling dpms to double check.
I just want to post the info incase someone like me was planning on buying one of the other and wanting to fire both.

THIS IS FROM DMPS ADMIN ON THEIR FORUM
http://dpmsinc.com/forum/posts.aspx?postID=2271

While you can physically fire either 308 or 7.62 NATO from a 308, you
will see reduced accuracy from increased wear in the throat of the
rifling and a higher chance of erratic cycling, including a higher
chance of failures to extract. It is for this reason we recommend using
only commercial 308 in a 308 barrel.

DPMS does not recommend or warranty the use of 7.62x51 ammo in a .308 chamber.

A 7.62x51 chamber can handle both types of ammo. Determine your actual chambering by looking on the underside of your barrel forward of the gas block or front sight base.

The lower receivers of these two rifles are identical and will be stamped 308 even on a 7.62, the lower stamp should not be used to determine actual chambering. FWIW, the .260, .243, .300 SAUM, .308, 7.62x51 and 6.5 Creedmoor all use the same lower receiver.