I've intentionally opened the choke on a bunch of guns. Old American doubles, in particular, tend to come pretty tightly choked. That being said, I've been having a lot of fun shooting an untouched Parker Trojan 16ga (chambers still short, although the forcing cones look as if they may have been lengthened) choked M/F. I can see shooting prairie grouse and pheasants with that gun, although I might have to slow my normal shooting speed a bit, but no way can I imagine hunting grouse and woodcock with that gun, unless I were to shoot spreaders. Managed a 22 with it at skeet the other day, and might have done better had I not been trying to see how far out I could break the low single at 5, 6, and 7 with the full choke. Successful at the first two, missed the darned low 7! But I can't imagine eating a grouse or woodcock I hit at normal skeet range (which is a bit longer than the normal range at which I take grouse and woodcock).
