the whole lot is rubbish its only one thing that concerns them is making money money money who on earth wants to buy a £2000 gun and have too replace your barrels in 5 years time at what cost most likely have of the price of the gun no one has ever proofed that lead poisons any bird they even tried feeding mallard corn with lead pellets so see if they got lead poisoned it did not work as i said its nothing but money grabbers