I fired PWN's 500/416 Krieghoff at Camp Cooley. At 40 yards a Right/Left,Soft/Solid cut one ragged hole. The rifle has slightly more recoil that a 450/400 but kicks less than a 470. While it is no secret that I prefer British Big Bore doubles, I have no problem with the Krieghoff cocking system. I think the other "modern" double rifle makers are making a very BIG mistake by not chambering their doubles for one of the 450/400's or the 500/416. With a scope in QD mounts a 40 cal double would be an excellent all-round big bore rifle. With fast expanding 300 grain bullets the 40 cal doubles make great deer and pig guns, giving you plenty of practice. With 400 grain bullets they work great for elk moose and the big bears when you do not expect long shots.
A 500/416, or a 450/400 double with a 9,3x74R double, [and OK a 300 Mag for the long range stuff] would make an excellent hunting battery.