I was thinking of getting the chokes modified by Mialls anyway so I will definitley do that . I have been doing a bit of research and asking questions over the last few day about what to do. The general concensus seems to be ,dont bother with the backboring but that the longer forcing cones will have a few benifits. They said it will improve patterns a bit ,especialy with heavier loads. They said it reduces recoil a bit and reduces stress on the gun a bit as well. According to Mialls ,if I get the longer forcing cones and modify the chokes to a more modern design ,that it should be steel proof if I ever want to use it with steel.
I will probably do it for these reasons alone and then experiment with different loads as you said to get the pattern how I want it.
I,m not sure exactly what a pigeon gun is ,though I have hear of it a few times. This gun has a sligthtly concave rib with serations filed into it. It also has a pistol grip with an engraved grip cap. Can you tell me what a "pigeon gun" means?