Hi I have 470 ne in Krieghoff and 500 ne in Merkel. A friend has 500-416 Krieghoff. I would think the 450/400 would b nice to shoot and still with enough power for most dangerous game. If u can try a 470 and shoot it well I would go with it. I would look at the Krieghoff as the decocking on theses guns are very safe to carry and your ph will appreciate it as I do. I use the Krieghoff wen I’m guiding as I can carry all day loaded. If I hunt buffalo buy myself I’ll use the Merkel. Main thing is to be able to shoot it heaps and we’ll.