Thanks for the advice, iv`e just Googled the weights of Steel and lead BBs, a bit of a difference i had`nt realised. The lead BBs are a nice tight fit in the cartridge and i am using these so i can try the pistol at the range ( i hope) it deforms the lead balls quite well especially off a full bulb. Do you think as the fps drops there would be a problem with ricochets ? Regards Gordon.