Hornady Superformance .257Roberts 117GR SST 20Rds

Overview

Superformance ammunition is 100 to 200 fps faster than conventionalammunition and achieves this performance in every gun without increasesin felt recoil muzzle blast temperature sensitivity fouling or loss ofaccuracy. Superformance uses ultra progressive propellants that take yourfavorite SST or GMX bullets to levels of performance simply unattainablewith conventional propellants. In order to get more velocity in the past shooters have used a brute force approach with large charge weights of a slow burning powder in a larger cartridge case which ultimately leads tomore recoil and muzzle blast. The Superformance solution utilizesspecialized powders at normal charge weights that impart all usable energyto the bullet reducing the rocket nozzle effect at the muzzle while stillincreasing velocity. Superformance is safe to use in all firearms including semi-autos lever gun and pump actions. Increases in rifleperformance no increases in barrel wear and felt recoil along withsuperior temperature stability are all realized with Superformanceammunition.