Hi I have a Lamber 28ins U/O, I shot 6 shots at a pattern plate, taking a rifle-like aim,the patterns all on top of each other, but the bulk of the pellets are 6ins low. I shot 6 shots from a mounting position all 6 on top of each other but again bulk of the shot 6ins low, I also miss clays low. What can I do to put this right,can anyone help me thank you Paul.