Other than possible safety concerns is there any reason a 21 inch barrel would be better that a 17" barrel. I would love to have mine cut down as long as I wasn't sacrificing my pattern. I don't want to give up any range. Also can someone re thread the barrel so it can accept choke tube again or do people just typically buy a new barrel if they want a shorter one? It's a dedicated turkey gun so no chance of any wing shooting.