Eley Hawk have been at the forefront of development of Non Toxic loads for over two decades. The initial development of the Eley Black Feather utilising a Tungsten based polymer proved uneconomical and the performance of the material left much to be desired. Eley then developed the Bismuth cartridge which has become the market leader in performance Non Toxic ammunition. Bismuth is a material based on a blend and mix of Bismuth (Bi) and Tin (Si). It has a density of 9.3 against 11.3 for lead, this difference is minimal and the down range performance of Bismuth is almost the same as lead with the added advantage being 12% more pellets by weight