Armscor manufactures 40-grain .22 Winchester Magnum Rimfire (WMR) ammunition—commonly labeled locally as .22 MRF—rather than a .22 Long Rifle (.22 LR) Magnum. It typically comes in Jacketed Hollow Point (JHP) or Full Metal Jacket (FMJ) configurations, delivering an average muzzle velocity of roughly 1,838 to 1,875 feet per second. 

Technical Specifications

• Caliber: .22 Magnum (.22 WMR / .22 MRF)

• Bullet Weight: 40 grain

• Bullet Type: Full Metal Jacket (FMJ) / Jacketed Hollow Point (JHP) options available

• Muzzle Velocity: ~1,838 – 1,875 fps

• Muzzle Energy: ~312 ft-lbs

• Packaging: Standard 50-round boxes or bulk bricks

Performance & Use

• Velocity: High-speed rimfire round designed for flat trajectories out to 100+ yards.

• FMJ vs. JHP: The FMJ variant offers straight-line penetration with minimal expansion, ideal for target shooting or small-game pelt preservation, whereas the JHP variant is geared toward varmint control. 

• Availability: Commonly retailed across local Philippine tactical shops (such as SpeedEdge) for roughly ₱22.50 per round, as well as global distributors via Armscor's international channels.