Umarex 850 Air Magnum — CO2 Air Rifle

Umarex 850 Air Magnum Review — A CO2 Classic

The Umarex 850 Air Magnum is a CO2-powered air rifle that has earned a loyal following among UK shooters. The bolt-action design uses an 8-shot rotary magazine for rapid follow-up shots. Available in .177 and .22 calibre, the 850 Air Magnum is ideal for target shooting, plinking, and light pest control. The 1/2 inch UNF threaded barrel accepts standard silencers. The two-stage adjustable trigger lets you fine-tune the pull weight. The manual safety is positioned for easy thumb operation. The ventilated rubber butt pad reduces felt recoil. The rifle is also sold under the Hammerli 850 AirMagnum brand.

Umarex 850 Air Magnum UK — Technical Specifications

The 850 Air Magnum features a rifled steel barrel for consistent accuracy. The 8-shot rotary magazine is easy to load and reliable. The CO2 system uses two 12g CO2 cartridges inserted into the buttstock. The rifle delivers approximately 60-80 shots per fill. The two-stage adjustable trigger is set at approximately 3 lbs out of the box. Overall length is 1100mm, and weight is 3.2kg. The beechwood stock has a raised cheekpiece for comfortable shooting. The 11mm dovetail rail accepts standard scope mounts.

Umarex 850 Air Magnum Magazine — 8-Shot Capacity

The 8-shot rotary magazine is the 850 Air Magnum’s key feature. The magazine sits flush in the action and feeds pellets reliably. You can fire 8 shots before reloading. This is a significant advantage for pest control and target shooting. The magazine is easy to load and remove for cleaning. Spare 8-shot magazines are available separately. We recommend buying extras for extended shooting sessions.

Umarex 850 Air Magnum Problems — Honest Owner Feedback

The 850 Air Magnum has received constructive owner feedback on UK airgun forums. The CO2 system is the most common issue. Owners report that the seal between the CO2 cartridges can fail, causing gas to leak. Using Pellgun oil on the CO2 cartridge tips helps maintain seal life. The bolt action can be stiff out of the box. This smooths out with use. The trigger is functional but not as refined as more expensive rifles. On the positive side, owners consistently praise the 850 Air Magnum for its accuracy, shot count, and value for money. One owner called the 850 Air Magnum “a brilliant budget CO2 rifle” . Another said it was “accurate, reliable, and a pleasure to shoot” .

Umarex 850 Air Magnum Accuracy — What Owners Achieve

The 850 Air Magnum produces good accuracy with the right pellet choice. Owners recommend H&N Field Target Trophy, JSB Exact, and Air Arms Diabolo Field pellets. One owner reported 1-inch groups at 25 yards with JSB Exact pellets. Another owner achieved consistent results at 30 yards with H&N FTT pellets. The CO2 system provides consistent power, contributing to the rifle’s accuracy. The ventilated rubber butt pad and adjustable trigger improve shooting comfort.

Umarex 850 Air Magnum For Sale UK — In Stock at Fieldcraft Airguns

Fieldcraft Airguns has the Umarex 850 Air Magnum in stock now in .177 and .22 calibre. The rifle includes an 8-shot magazine and a fill probe. Every Umarex 850 Air Magnum comes with our exclusive 12 month warranty. We recommend adding a pack of 12g CO2 cartridges and a tin of quality pellets to your order — H&N Field Target Trophy or JSB Exact work well. Spare 8-shot magazines are available separately. We recommend buying at least one extra for extended shooting sessions. For owners who want to reduce the report, we recommend a suitable 1/2 inch UNF silencer.