I have a parker GH, 10 gauge, 27/8 chambers. It was my grandads, my brothers didnt want it, ive taken geese, and ducks with bismuth reloads, turkey, and others. RST, makes some loads that are very friendly to old shotguns. I also have a purdey made in 1890, that I won on a auction for a song due to sleeved barrels. If they could talk .