Assuming the gun is in decent shape and the barrels are not bent,badly dented,pitted,etc I can't understand why people just don't try different loads and see how they work before taking metal out of good barrels. There are dozens,if not scores,of load combinations for most guages to try for the most effective patterns.I realize that once you own it you can do as you please but you could at least give the original manufacturer the benefit of the doubt and try at least a dozen different shotshell combinations.I am also a big fan of duct tape and cardboard to make non-permanent stock alterations on good guns.