7mm-08 Rem 139 gr GMX® Superformance®

7mm-08 Rem 139 gr GMX® Superformance®
Velocity (fps) / Energy (ft-lbs)
Muzzle 100 200 300 400 500
2910/2613 2718/2280 2534/1982 2358/1716 2189/1478 2026/1267
Trajectory (inches)
Muzzle 100 200 300 400 500
-1.50 1.60 0.00 -7.00 -20.30 -40.90

The NEW standard by which all ammunition will be judged.


Superformance ammunition is 100 to 200 fps FASTER than any conventional ammunition on the market today, and achieves this performance in EVERY gun, WITHOUT increases in felt recoil, muzzle blast, temperature sensitivity, fouling or loss of accuracy.


Superformance is a cutting edge technological advancement in ammunition design that transcends convention and achieves the highest performance of any ammunition on the market today.


Superformance uses ultra progressive propellants that take your favorite SST or GMX bullets to levels of performance that are simply unattainable with conventional propellants. In order to get more velocity in the past – shooters have used a brute force approach – large charge weights of a slow burning powder in a larger cartridge case. Ultimately this leads to more recoil and muzzle blast. The Superformance solution is an elegant approach that utilizes specialized powders…at NORMAL charge weights, that impart ALL useable energy to the bullet reducing the ROCKET NOZZLE EFFECT at the muzzle while still increasing velocity!


Superformance provides increased performance, and is safe to use in ALL firearms, including semi-autos*, lever gun and pump actions.

Increases in rifle performance, no increases in barrel wear and felt recoil, along with superior temperature stability are all realized with Superformance ammunition.

It really IS… Rocket Science!

Performance, Recoil & Comparison Tests

Superformance ammunition achieves 100 -200 fps over SAAMI standard in all calibers, all bullet weights and all bullet types. This performance is achieved by revolutionary new, extremely efficient powders optimized for each load. DOWNLOAD FULL ARTICLE…


*Superformance in Gas Operated Firearms

Superformance ammunition is safely within SAAMI pressure guidelines. Gas operated firearms are perfectly safe to use with Superformance ammunition. However, we have conducted tests and conclude that some systems work far better than others. READ MORE…


Item Number 80576
H.I.T.S. # (100 Yard Value) 995
Ballistic Coefficient (G1) .486
Sectional Density .246
Quantity 20/Box
Price: $48.24
Purchase From Retailer
Photo Date Shooter Title Product
12/21/2011 Russ & Mary Newton 7/08 Superformance 7mm-08 Rem 139 gr GMX® Superformance®
11/28/2011 Max Rivera Max's First Deer 7mm-08 Rem 139 gr GMX® Superformance®
10/19/2014 Sandi Rodoni First GMX Buck 7mm-08 Rem 139 gr GMX® Superformance®
02/14/2011 Maxwell Rivera Max's first big game kill 7mm-08 Rem 139 gr GMX® Superformance®
12/06/2012 Jody Lynch Wild Boar 7mm-08 Rem 139 gr GMX® Superformance®
08/23/2012 Stevin Lindsey 12 year old stops HUGE LION! 7mm-08 Rem 139 gr GMX® Superformance®


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