If I were to use a Krieghoff for high volume shooting, I think I would install a weaker top lever spring. A Perazzi has a much friendlier top lever operation. If I had to build the ideal gun for high volume shooting, it would be an assisted opening gun that also closes easily and smoothly. The two that come to mind are the Model 21 and the 680 series Beretta. Whatever the choice, I would install the JS Air Cushion stock or another recoil absorbing stock with the butt and comb in one piece.