Just picked up a 20 guage USH from the classidfieds here. It shoots great. Hornady SSTs Group under 2 inches at 100 yards. It shoots Brennke KOs descent as well . Under 4 inches at 75 yards, Its got the 24 inch barrel. Im really thinking about cutting down the Barrel to 19 inches, just to make it handier in a tree stand. Most if not all shots will be 100 yards. How much velocity will I lose,