I have inherited a 28" Winchester Model 42 manufactured in 1955 and in excellent condition. It is choked "Full" according to the barrel markings. I'm a skeet/SC guy not a hunter. I would like advice on whether to have the choke opened up to Skeet or at least IC. Opinions please -- is this an OK idea or have I really damaged a vintage gun that should be saved? No right answer of course, but I'd like to hear from some of you vets.