Barnes Suppressor Series .300 BLK 205gr Sierra GK HPBT Expanding 20rd 32519

The Barnes Suppressor Series .300 BLK 205gr Sierra GK is the definitive answer for shooters who refuse to choose between stealth and stopping power. While most subsonic rounds struggle with "pencil-through" hits and finicky cycling, this load is purpose-built to run flawlessly. Optimized for the suppressed AR-15, it delivers a whisper-quiet signature and a massive terminal punch, making it the premier choice for low-profile hunting and tactical applications.

The biggest flaw in traditional subsonic .30-caliber ammo is that heavy match bullets often act like solids, failing to expand at low velocities. This Barnes load fixes that by utilizing a specialized Sierra GameKing HPBT projectile. Featuring a thinner jacket and a custom-engineered lead-alloy core, this bullet is "tuned" to mushroom at impact speeds as low as 900 fps. You get the match-grade accuracy Sierra is famous for, combined with the lethal expansion required for ethical hunting—all at a subsonic pace.

On the range or in the field, performance is measured by reliability. At 1,060 fps, this 205-grain heavy hitter eliminates the "sonic crack," while its high ballistic coefficient (G1: 0.480) keeps your trajectory stable and your energy on target. To keep your rifle running longer, Barnes uses a clean-burning, pressure-tuned propellant that ensures your gas system cycles consistently while drastically reducing the "gas-to-face" and carbon buildup common with suppressed shooting.

Features

• 205gr Sierra GameKing HPBT: Thin jacket and soft core engineered for low-velocity expansion ensures reliable terminal performance below 1,000 fps.
• Subsonic 1,060 fps Muzzle Velocity: Eliminated transonic transition results in a significantly reduced acoustic signature in suppressed systems.
• Specialized Propellant Curve: Optimized gas system compatibility provides consistent cycling and reduced fouling in semi-auto .300 BLK rifles.
• Aerodynamic Boat Tail Profile: High G1 BC of 0.480 improves flight efficiency for tighter groups and superior downrange energy retention.

Technical Specifications

• Ballistics: .300 AAC Blackout | 1,060 fps (Subsonic) | 512 ft-lbs (Muzzle)
• Projectile: 205 Grain | Sierra GameKing HPBT (Expanding) | Jacketed Lead Core
• Cycling: Brass Case | Boxer Primed | AR-15 / Semi-Auto & Bolt Action
• Logistics: 20 Rounds Per Box | Boxed / 10-Box Case | Suppressor Series Optimized
• Dimensions: ~23.1 cu. in. (5.9" x 2.8" x 1.4") | ~0.74 lbs | 32519
• Application: Suppressed Hunting | Medium-Game / Defensive Use | Low-Signature Environments
• Country of Origin: USA

For shooters running suppressed .300 BLK platforms, this is a purpose-built solution that solves the two core failures of subsonic ammunition: terminal ineffectiveness and cycling inconsistency. SMKW is your trusted source for performance-driven ammunition backed by proven manufacturing standards.