Only way to know is to shoot the gun and see if you have the same 6" problem. you very well may not. If you do you could look at getting a custom bored choke tube, eccentric, made to correct the problem. I knew one fellow who put a slightly oversized front sight on his gun and then removed a little off one side to move the center of the pattern over. It could be noticed if you sighted down the rib like a rifle but never if you mounted the gun and just shot it. His solution cost less than five bucks and fixed his problem.
