The Gamo Magnum Pro air rifles were tested in .177 and .22 calibers using Gamo Red Fire pellets. Chronograph tests revealed the .177 caliber achieved higher velocities (1097-1240 FPS) compared to the .22 caliber (828-874 FPS). A penetration test against an OSB board at 25 and 50 yards demonstrated the .22 caliber's superior power, with pellets nearly passing through, while the .177 caliber pellets showed limited penetration.
The Gamo Magnum PRO and Gamo Magnum Gen 3i in .22 caliber share the same power plant, delivering 22-25 ft-lbs of energy. Key differences lie in the stock design: the Pro features a Monte Carlo stock with ambidextrous thumb rests, while the standard model has a thumbhole pistol grip. The Pro's stock offers improved ergonomics, a higher cheek rest for better scope eye relief, and a wider forend. Both utilize Gamo's Gen 3i 10-shot repeating magazine system and silencer technology.
The Gamo Swarm Magnum Pro Gen3i in .22 caliber demonstrated impressive accuracy by hitting a spray paint can at 100 yards on the first shot. The 10-shot auto-loading break barrel mechanism and the rifle's low-profile design were highlighted. This test confirms the rifle's capability for effective long-range airgun shooting.
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