I'm thinking about getting a steel rod the right diameter to fit tightly inside the barrel of a paintball gun, and drill a hole down the middle to fit 00 buckshot. I have a friend who works as a machinist who says he can do it, no problem. Anyone have an idea what the velocity of this would be? Obviously this could be increased by applying heat to the co2 or using a gas which builds more pressure, but I don't know how well the gun would hold up under increased pressure. Any thoughs on this, or the legality of all this?