I own a Krieghoff in 500-416,I shoot two loads ,the standard 410 0r a 400 at factory velocities,2350 fps,went to a 400 because wanted to use a NF 400 solid on my last hunt for buff,& secondly I load a 300 gr tsx about 2300 fps for smaller game,this gun & caliber is kinda boring:) it's accurate & really kills well with both the factory & my light load,what's to improve except the name maybe?