Hyperion Munitions HMBX914 9mm 147gr Subsonic Ammo - 50rd Box

The Hyperion Munitions HMBX914 delivers consistent subsonic performance with 147-grain projectiles engineered for suppressed and standard 9mm firearms. This premium ammunition combines match-grade components with reliable feeding across pistol and carbine platforms. Each cartridge meets strict velocity specifications to maintain subsonic flight while delivering effective terminal performance.

What Makes This Different

The HMBX914 utilizes a specially formulated powder charge that maintains consistent velocities below 1,100 fps across temperature variations. Unlike standard 147-grain loads that can vary significantly in performance, this ammunition maintains tight velocity spreads of less than 50 fps. The copper-plated projectile features a rounded nose profile that enhances feeding reliability in both match-grade and duty pistols.

Key Features

• 147-grain copper-plated round nose projectile for reliable expansion
• Subsonic velocity maintains accuracy with suppressed firearms
• Low-flash powder reduces muzzle signature in low-light conditions
• Boxer-primed brass cases enable reloading for cost-conscious shooters
• 50-round boxes provide convenient range quantities
• Compatible with all SAAMI-spec 9mm Luger chambers
• Consistent 1,050-1,100 fps muzzle velocity from 4-inch barrels

Range testing demonstrates reliable cycling in popular platforms including Glock, SIG Sauer, and Smith & Wesson pistols. The subsonic design reduces noise signature by approximately 3-5 decibels compared to standard velocity loads when used with suppressors. Competition shooters appreciate the reduced recoil impulse that enables faster follow-up shots, while the consistent point of impact matches most factory zero settings.

Technical Specs

• Caliber: 9mm Luger (9x19mm Parabellum)
• Bullet Weight: 147 grains
• Bullet Type: Copper-plated round nose
• Muzzle Velocity: 1,050-1,100 fps (4-inch barrel)
• Muzzle Energy: 365-395 ft-lbs
• Case Material: Reloadable brass with Boxer primer
• Packaging: 50 rounds per box, 20 boxes per case (1,000 total rounds)
• SAAMI specifications compliant

This ammunition represents solid value for shooters requiring consistent subsonic performance without premium match-grade pricing. The bulk case packaging reduces per-round costs while ensuring adequate supply for extended training sessions.