I have a 62 trade gun that shoots low. The sight is about 4 inches back and is only about 1/8 inch high. If I show too much barrel the sight is useless. I have been told to move the sight to the end of the barrel. Would that help? If I bend the barrel, where do I bend it; at the breech, in the middle, or out at the muzzle. What is the best way to bend a barrel?