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Hornady 7X57MM 139 SST SF, 20 Rounds/Box

Hornady 81553 Rifle Rounds Zoom

Please note: Many of our pictures are stock photos provided to us by the manufacturer and may not accurately represent the actual item. Please review the Full Description and Specifications before ordering.

$29.59
Model #: 81553

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QUICK DESCRIPTION
Hornady Superformance Rifle Ammo. 7x57mm Mauser, 139 GR, SST. Box price, 20 Rounds/Box.
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Full Description

    Details

    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 brute force approach with large charge weights of a slow burning powder in a larger cartridge case which ultimately leads to more recoil and muzzle blast. The Superformance solution utilizes specialized powders at normal charge weights that impart all usable energy to the bullet, reducing the rocket nozzle effect at the muzzle while still increasing velocity. Superformance 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.
Specifications
    Caliber7X57mm Mauser
    Bullet TypeSST
    Bullet Weight139 GR
    Muzzle Energy2351 ft lbs
    Muzzle Velocity2760 fps
    Rounds Per Box20
    Boxes Per Case10
    ApplicationPerformance/Protection
    Casing MaterialBrass
    Coefficient.486
    Product ModelSuperformance
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