Thanks, guys, for all your advice. I failed to ask opinions about opening the choke. I described the gun as crispy, but it's no museum piece ... enough handling wear to use in the field without guilt. I wouldn't want to open it to a skeet-type choke, because I have plenty of guns offering that kind of pattern, but I would consider opening to Mod, if it would make a big practical difference. On my question about the original intent for a Full choke 20-gauge in the '30s, my best guess is that, as with 16s and 12s, unlike today, Full was seen as a reasonable choice back then for an all-around field gun. I've heard here and elsewhere that modern ammo delivers much tighter patterns than standard shells from a few generations back, and that could also be a factor. TT
