Hornady Superformance Brass .300 Win Mag 180-Grain 20-Rounds SST

Hornady Superformance Features Hornady Superformance ammunition is 100 to 200 fps faster than conventional ammunition and achieves this performance in every gun without increases in felt recoil muzzle blast temperature sensitivity fouling or loss of accuracy. Superformance uses ultra progressive propellants that take your favorite SST or GMX bullets to levels of performance simply unattainable with conventional propellants. In order to get more velocity in the past shooters have used a b