As we know it is important to fill your PCPs with dry air, but the barrel contains atmospheric air. When the pressure wave travels down the barrel does it cause condensation? I would imagine it would, but I don't know, so please correct me if I am wrong. I have however never had a problem of corrosion in the barrel. I put this down to it being coated with lead. If we have to switch to alloy pellets could this become a problem? Would it be worth adding this to the lead ammunition consultation?