I have a gun with a slight bulge about midway down the left barrel. I have seen guns blown out there but I intend to shoot this gun with low presure loads and because of a shoulder injury, I keep my forward hand at the back of the forarm away from immediate danger. The barrel has a 1912 full choke so I am thinking I should have it opened to modified, improved cylinder or cylinder to reduce pressures even more? What advice on the chokes and pressure can you offer? Thanks very much. Kurt