All 5.56 NATO ballistic gelatin shots were fired from 30 feet. 5.56 NATO 5.56 NATO Many rifles chambered in 5.56 NATO are not realizing their full potential because departments are shooting 223 Rem ammo. To get all the performance the 5.56 NATO can deliver, the Hornady® 5.56 rounds are tailored to maximize performance. Your 5.56 NATO chambered rifle was designed to take advantage of the higher pressure of the 5.56 NATO cartridge — higher pressure translates to increased velocity, higher energy and harder-hitting performance. CAUTION: Firing 5.56 NATO ammunition in 223 Remington chambers will produce a dramatic rise in pressure which increases stress on the weapon, risking wear, permanent damage and/or injury. Please see our Application Guide for full details. 55gr. GMX® TAP® BARRIER™ ITEM #81255 APPLICATION: PATROL/DUTY TAP® Barrier™ turns cover into concealment. The “solid” choice for law enforcement and military professionals is the 5.56 NATO 55gr. GMX® TAP® Barrier™ from Hornady®. Constructed of a premium copper alloy, the 55 gr. GMX® has a B.C. of .245 and is a highly accurate solution for departments that are seeking a precise alternative to traditional bullets loaded in the 5.56 NATO. With its monolithic construction, the GMX® boasts dependable terminal performance and high weight retention when encountering barriers. Bullet: 55 gr. GMX® TAP® Barrier™ B.C.: .245 S.D.: .157 Muzzle Velocity: 3287 fps Barrel: 16" Twist Rate: 1:9" Total Penetration: 17" Max. Cavity: 4" Depth to Max. Cav.: 5" Entry: 1" Retained Weight: 55.0 gr. 55 gr. GMX® TAP® Barrier™ 16" bbl | DPMS AR-15 muzzle 100 yds 200 yds 300 yds 400 yds 500 yds Velocity (fps) 3287 2864 2495 2155 1843 1564 Energy (ft lbs) 1303 1001 760 567 415 299 Trajectory (inches) -1.5 0 -2.8 -11.2 -27.1 -53.4 BARE GELATIN 21 RIFLE 1 - 8 0 0 - 3 3 8 - 3 2 2 0