I know nothing about that but I do know I hate it. I am shooting half .45's and the rest .22 every time I hit the range now because I am trying to stock up. I need to get a 1911 in 9mm if the price on 9mm's don't go upas far as .45's are going.I go to the range on the avg 2-3 times a week, next year it may be only 2 times a week if it climbs much more.