The RWS Subsonic HP .22 LR 40gr Rimfire Ammunition (Model 2132664) is engineered for low-noise small game hunting, agricultural varmint control, and target practice. Featuring a 40-grain lead hollow point projectile with a factory-rated muzzle velocity of approximately 1,033 ft/s (315 m/s) and 95 ft-lbs of muzzle energy, this cartridge stays consistently below the speed of sound to eliminate sonic crack. Its specialized hollow point cavity expands reliably at subsonic velocities, ensuring humane terminal lethality on small game when fired from bolt-action, lever-action, or single-shot Category A rimfire rifles.

Key Features

• Subsonic Velocity Profile: Operates at an average muzzle velocity of 1,033 ft/s to prevent sonic crack, significantly reducing the acoustic footprint on rural properties and noise-sensitive areas.
• Engineered Hollow Point: The 40-grain lead hollow point projectile is designed for controlled expansion and effective energy transfer at low impact velocities.
• All-Weather Wax Lubricant: Coated with specialized wax lubrication to reduce barrel lead fouling across varying field conditions.
• Manual Action Reliability: Optimized for consistent ignition, feeding, and headspacing in manual bolt-action, lever-action, and single-shot rimfire platforms.

Specifications

• Calibre: .22 Long Rifle (.22 LR)
• Bullet Weight: 40 grains (2.6 grams)
• Bullet Type: Lead Round Nose Hollow Point (LHP)
• Muzzle Velocity ($V_0$): 1,033 ft/s (315 m/s from a 650 mm barrel)
• Muzzle Energy ($E_0$): 95 ft-lbs
• Ballistic Coefficient (BC): 0.105
• Overall Cartridge Length: 25.4 mm (1.0 inch)
• Package Quantity: 50 rounds per box
• Package Weight: Approximately 227 g (0.5 lbs)

Who is the RWS Subsonic HP .22 LR 40gr for?

• Small game hunters — requires low acoustic signatures when targeting rabbits and hares at close range, utilizing this .22 LR Subsonic Hollow Point Ammunition to achieve humane expansion with a 40 grain projectile traveling at 1,033 ft/s.
• Pest controllers — managing agricultural varmints around livestock and rural infrastructure, relying on this 50-round box of .22 LR Subsonic Hollow Point Ammunition with a 0.105 BC to deliver predictable trajectories within standard property boundaries.

Less suitable for: semi-automatic or self-loading rimfire firearms, as the subsonic pressure impulse is insufficient to cycle blowback actions reliably; choose high-velocity .22 LR cartridges for semi-automatic platforms, or higher-velocity rimfire cartridges (.22 WMR / .17 HMR) and centrefire calibres for engagements past the 50 to 75-metre threshold.