Somebody please help me understand

[ss10ring]

Federal 7.62x51mm 175gr Gold Medal Match, crimped primer pocket, 20rd Ammunition is:

New Production
Non-corrosive
Boxer-Primed
crimped primer pocket
Fully Reloadable Brass Cases

Velocity (Muzzle): 2600
Energry (Muzzle): 2625
Manufacturer # GM76M2

Pricing: $19.95 per 20 round box

Federal Gold Medal Match .308 175gr Sierra MatchKing BTHP
$39.95 a box

isn't this exactly the same ammo just labeled different?

 

[Trigger Monkey]

Re: Somebody please help me understand

Sort of, I had to look it up but here's a thread where this very thing was addressed.

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2192189

It appears that GM76M2 uses a milspec primer while GM308M2 doesn't.

 

[ss10ring]

Re: Somebody please help me understand

Thanks, shots awesome in my gun chrono at 2599 with my can. I was trying to find info. Guess I'll buy a lot more

 

[CSI]

Re: Somebody please help me understand

Not to be a smart ass but one is .308 and the other is 7.62x51. Not exactly the same spec.
The 7.62x51 GMM is Federal's military contract ammo in a civilian packaging. The cases are also annealed and will not appear clean and shiny like the .308 GMM.
Being 7.62x51, the case dimensions are also different. If your rifle has a match .308 chamber then the 7.62x51 will be a tight fit. I have used both in a GAP Crusader and the 7.62x51 requires a little forward bump on the bolt to chamber when compared to the .308 GMM. Shoots good otherwise.