Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
The CCI Quiet 22LR Ammo 40 Grain Round Nose is a subsonic rimfire cartridge engineered to reduce noise without sacrificing accuracy at close range. CCI loads this round to 710 feet per second — well below the 1,125 fps threshold where supersonic crack occurs. The result: a report roughly one-quarter as loud as standard velocity 22LR, making it suitable for backyard plinking, pest control in noise-sensitive areas, and suppressed rimfire shooting. The 40-grain round nose profile is designed for bolt-action and single-shot rifles; semi-automatic firearms may not cycle reliably due to reduced recoil impulse, though the round is safe to fire in any 22LR chamber. CCI manufactures this ammunition in the United States using non-corrosive components, and it ships in a 500-round bulk pack configured as ten boxes of fifty rounds each.
Built for the Box
CCI loads the Quiet 22LR with a 40-grain lead round nose projectile seated to subsonic velocity. At 710 fps, muzzle energy is 45 foot-pounds — sufficient for small game and paper targets inside 50 yards. The subsonic profile eliminates the supersonic crack, reducing the acoustic signature to the mechanical action of the firearm and the primer report. Shooters using bolt-action rifles or single-shot platforms will experience the full benefit of the reduced noise; semi-automatic 22LR firearms may short-stroke due to insufficient recoil energy to cycle the bolt, though function can often be restored by pairing the round with a quality suppressor to increase backpressure. This load is optimized for use with rimfire suppressors, where the combination of subsonic velocity and sound suppression produces hearing-safe report levels without electronic ear protection.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 22 Long Rifle |
| Bullet weight | 40 grains |
| Bullet type | Round Nose |
| Muzzle velocity | 710 fps |
| Muzzle energy | 45 ft-lbs |
| Velocity rating | Subsonic |
| Rounds/box | 500 (10 boxes of 50) |
| Case | Brass |
| Primer | Non-corrosive |
| Lead free | No |
| Intended use | Range & Target |
| Manufacturer | CCI |
| Country of origin | United States of America |
This load joins other subsonic rimfire offerings in the CCI 22LR Ammo category, providing shooters with a quiet training option for precision rimfire rifles and suppressed platforms.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Always follow the four universal rules of firearm safety.
- Verify current state and local ammunition laws before ordering — some jurisdictions restrict lead projectiles or require ammunition registration.
- This product contains lead, a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling; do not eat, drink, or smoke while handling ammunition.
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