 By 1860 they were making pinfire shotshells and first listed them for sale in "The Ironmonger & Metal Trades Advertiser".On 13 April 1861 William Thomas Eley took out a patent for an improvement to the pinfire shotshell.The key aspect to this patent was to better fix the cap into the case and prevent the pin from flying out of the case on detonation.The growth of business accompanied by moves to the Grays Inn Road in 1864, and by the development of the Boxer cartridge designed by Colonel Boxer - Chief Superintendent of the Royal Arsenal, Woolwich - and adopted by the government in 1866.