Finally, they identified 700 tertiary variables. Then they determined 200 secondary variables, including things like the ambient humidity in the assembly facility, the metallurgy of the cases, and human competence. Even with decades of worldwide success, the company tasked its engineers to start with the Eleyprime System as the foundation and reinvent Tenex from the ground up.Īnswering the challenge, Eley engineers identified 50 primary variables, such as bullet mass, case internal volume, and propellant charge mass. As a writer once put it, "It was a stunning achievement." According to the company, Eley Edge breaks engineering boundaries with a scientifically developed matte-black oxidized finish that microscopically increases the friction between the case and the projectile, resulting in a stabilized projectile release force that delivers greater internal ballistic consistency and more consistent bullet flight.īut Eley didn't stop there. Reports show the round-to-round spread is an amazingly low plus/minus 1.0 milligram. With Eleyprime, the amount of priming material round-to-round is astoundingly consistent. Then a round-tip rod is inserted into the case to press the powder evenly into and around the rim, and a single, metered drop of water is added, which activates the compound over a several-hour period.Īfter drying, the cases can then be conventionally charged with precisely metered propellant. The Eleyprime System allows precisely identical amounts of the inert powder to be put into each case. This is because the primer in small rimfire cartridges is a significant portion of the actual propelling charge and because conventional priming compound is too sensitive to be aggressively metered and applied. This last part is critical because it has long been known that case-to-case variation in the amount of priming material is the most important factor regarding variations in. Are subsonic rounds more accurate free#Also loaded with a 40-grain RN bullet, Eley Club is used primarily for 50-meter Prone, 50-meter Three Position, 50-meter Free Pistol, 25-meter Pistol Women, 25-meter Rapid Fire Pistol, Lightweight Sport Rifle, and Silhouette competition shooting. This new Eleyprime process had two huge consequences: It eliminated the risk of explosion from the preparation and dispensing of priming compounds, and it allowed the amount of priming material applied to each individual rimfire case to be very tightly controlled in a normal workshop environment using automatic equipment. 22 cases that was non-explosive until exposed to water, whereupon a chemical reaction converted it to conventional lead styphnate (primer compound). By 1979 chemists were working on a dry powder mixture for filling. Engineers had worked for years perfecting Eley ammunition and in 1975 embarked on a journey to find a new, safer priming process. Then came the breakthrough Eley executives view as the most important single factor in the Tenex story: Eleyprime. It was the first time those titles were won using British-made ammunition. The 1951 British Championship and the Grand Aggregate events at Bisley were won by Eley team shooters using Tenex. 22 LR ammunition, built to extreme consistency, that British shooters could use to win British shooting competitions. 22 rimfire cartridges were produced in 1860, and the company's present world rimfire prominence began in 1951 with the introduction of the first generation of Tenex.Įley's goal behind the initial Tenex development was to provide British-made. The company has done that by being innovative.Īs Shooting Times has reported before, major developments from Eley include a joint patent with Samuel Colt for Colt revolver cartridges in 1855 Britain's first centerfire cartridge in 1857 patents during the 1860s in the development of the Boxer primer system development of the first bottleneck rifle cartridges in 1869 and thin-brass, totally waterproof shotshell cartridges in 1882. 22 rimfire competitive sports, including the Olympics and World Cup championships. 22 LR ammo has won a staggering number of medals worldwide in. It has earned the reputation of producing extremely accurate. Founded in London in the 1820s by brothers William and Charles Eley, Eley Ammunition has been in business ever since under various corporate identities and ownerships.
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