.22lr Cascade Ammo Subsonic 500 rds

Heavy .22LR Subsonic Loads Built for Suppressed Shooting

The Cascade Ammo .22LR Subsonic 500-Round Pack is purpose-built for suppressed rimfire shooting. Loaded with a 50-grain round nose projectile in a nickel-plated case, this is the heavy subsonic .22LR that suppressor owners have been looking for — quiet, hard-hitting, and reliable in rifles with the right twist rate.

At 1,040 FPS from 12" or longer barrels, these rounds stay comfortably subsonic, keeping the supersonic crack out of the equation and letting your suppressor do its job. Velocity will be slightly lower from pistol-length barrels, which is worth noting if you're running a suppressed handgun.

Why 50-Grain Subsonic?

Standard .22LR loads run 36 to 40 grains at velocities that often go transonic — the worst of both worlds for suppressed shooting. The Cascade 50-grain load solves this by combining a heavier projectile with a velocity that stays well below the speed of sound, even in varying temperature conditions. The result is a noticeably quieter report, reduced mechanical noise, and better terminal performance than lighter subsonic options.

The nickel-plated case feeds smoothly and resists corrosion, making these rounds a reliable choice for semi-automatic platforms where feeding consistency matters.

• Caliber: .22 LR
• Bullet weight: 50 grain
• Bullet type: Round nose
• Case: Nickel plated
• Velocity: 1,040 FPS (12" or longer barrels)
• Quantity: 500 rounds
• Suppressor ready
• 1-in-12" twist or faster recommended for stabilizing the 50-grain projectile

Twist Rate Matters with Heavy Subsonic .22LR

Running a 50-grain .22LR requires a barrel with adequate twist to stabilize the longer, heavier projectile. Cascade recommends a 1-in-12" suppressor-ready twist or faster. Many modern suppressor-optimized rimfire rifles — including popular platforms like the Ruger 10/22 with aftermarket barrels, CZ 457, and Volquartsen builds — are well-suited for this load. If you're unsure whether your barrel twist is compatible, stop in and our staff can help you sort it out.

500 rounds gives you a serious range session or a solid stock of suppressed plinking and small game ammunition. At Glenwood Springs Outdoors, 831 Grand Ave, Glenwood Springs, CO, we carry Cascade Ammo in store. Come in and talk suppressor-ready rimfire setups with our team.