That's a feature that's solely unique to Hatsan Airguns, and we think it's pretty cool. The Mod 135 comes in .22, .25, and .30 calibers, with the .30 delivering the most power. Normally, we reserve the phrase "big bore" for PCP airguns, but this is the one exception. The Mod 135 .30 cal fires a 44.75-grain pellet, generating over 30.. RRP: £449. Accuracy on test: 1.5" @ 30-yds. The Benjamin Trail NP uses a 'Nitro Piston' gas-ram system, and it's a slick looking gun that comes as a package deal. Included in the price is a Centerpoint branded 3-9x40 AO scope and Picatinny ring mounts; which all helps off-set the initial asking price.

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The best group size achieved by the Beeman Gas Ram air rifle tested by HAM was 0.5-inch x .375-inch at 10 yards. This is an indication that the factory claim is not impossible to achieve with an accurate shooter and the right pellets. CONSISTENCY. The Beeman Gas Ram air rifle demonstrated good consistency in muzzle velocity testing.. The idea is simple but ingenious; instead of a large mainspring sitting behind the piston to power the shot, the gas-ram sees a sliding rod set inside a sealed chamber of air or gas. As the gun is cocked, the rod is forced back, compressing the gas. When the gun fires, the rod is forced forward as the air is allowed to rapidly expand - but.