I actually don't hunt any more, cause wife won't eat game meat, but did want to build a .450 Bushmaster so my son and a friend could use it. However I have not found a source for Barrels or bolts for the Bushmaster! Don't know, but maybe Bushmaster has a patent or some other protection against other sales? The Bushmaster does have quite a bit better ballistics and theoretically should be more accurate and effective to at least 150 yards ~ probably 200?