257 Roberts +P 117 gr SST® Superformance®

Product Features

It IS rocket science!^®

Proven Hornady^® Bullets

Superformance^® ammunition is loaded with Hornady^® V-MAX,^® NTX,^® SST,^® CX,™ and InterLock,^® bullets for the ultimate in performance, no matter what the game.

Progressive Hornady^® Powders

Superformance^® Propellants are the heart of Superformance® ammunition and usher in a new era of performance.

Case and Primer

Like all Hornady^® ammunition, our Superformance^® rounds use the highest quality cases and primers available. Consistent components translate to consistent shooting in the field.

Performance

• IT IS FAST: 100 to 200 fps faster than conventional ammunition.
• IT IS ACCURATE: Uncompromising accuracy without increased felt recoil.
• IT IS CONSISTENT: Unfailing performance across a broad range of temperatures.
• IT IS VERSATILE: This new breed of ammunition is available in 17 Hornet to 444 Marlin, and is safe for use in all firearm types, including semi-autos, lever guns and pump actions.

Test Barrel (24″)Muzzle100 Yards200 Yards300 Yards400 Yards500 YardsVelocity
(FPS)Energy
(ft/lb)Trajectory
(inches)29462255-1.5270719031.624801598022651332-7.320601102-21.41866905-43.7

Product Specifications

Cartridge

Bullet

Product
Line

Sectional
Density

Ballistic
Coefficient

Minimum
Recommended
Twist Rate

Application

Box Count

Item #

257 Roberts

117 gr SST^®

Superformance^®

.253

.390 (G1)
–

Medium Game 50-300 lbs

20

81353