Yours is a confusing question Friend; don't see how a 6 pound 12-bore double gun could be "found to be much heavier than other like guns"? There are very, very few 12-bores weighing in a 6 pounds; the lightest Smith 12-bore I've personally handled weighting in a 6 pounds 12 ounces. But no one can tell you what a like gun "should weigh", but the catalogs offered 12-bores in weights ranging from 6.5 to 9 pounds. In this instance I seriously doubt Mr. Dannenfelser ordered this gun for everyday trap shooting; I'm guessing he also did a little upland bird shooting.