ELEY contact is a subsonic semi auto .22LR round designed with a softer sound and minimalrecoil. The reduced recoil delivers quicker sight picture recovery important for the competitivesemi auto shooter. Both ELEY force and ELEY contact are engineered with a heavier 42 grainbullet for high energy and are coated in a specially formulated paraffin wax to minimise buildup in actions and magazines. designed for high level competitive semi-auto shooters used for competitive semi-automatic riflefirearm .22LR semi-automatic rifle bullet profile: round nosecartridge length: 25.4mm / 1inchbullet weight: 2.7 grams (42 grains)lubricant: paraffin wax velocitymuzzle 332 m/sec (1090 ft/sec)50m (55yds) 313 m/sec (1026 ft/sec)91m (100yds) 292 m/sec (958 ft/sec) energymuzzle 15 kg/m (110 ft/lb)20m (22yds) 13 kg/m (97 ft/lb)50m (55yds) 12 kg/m (85 ft/lb) ELEY has received feedback from our customers and distributors thatÂ our black cases aren't made of brass. We can confirm that these cases are 100% brass and are fully recyclable. We have created a Brass Case Certificate which provides more details on the exact case composition and surface treatment. ELEYs revolutionary blackened case treatment can now be found on three products in our range: ELEY edge, ELEY force and ELEY high velocity hollow, benefiting target shooters, semi-auto users and hunters. The patented copper oxide film provides a consistent contact area between case and bullet. This increases and regulates friction for a more uniform bullet release and greater accuracy. The blackened cartridge cases are made from a brass alloy of copper and zinc. ELEY recommend that all spent brass cases are recycled to increase sustainability of this metal and to reduce the environmental impact.