The Kent Cartridge B12U305 is a superior grade, non-toxic Bismuth High-Performance round. Notably, these rounds boast a density that is 24% greater than that of steel. Each round is loaded to achieve optimum velocities, thereby ensuring maximal ballistic performance. Uniquely, these rounds are softer than steel, yet deliver higher performance. This ensures that they pose no harm to barrels and can safely be used with any kind of choke.