I have the following:

Krieghoff 470
Blaser S2 .375 H&H
Chapuis PH1 470

The Blaser out shoots them all, I have used my Chapuis the most, I find it to be regulated better than most English guns. I have been shooting a Rigby that is ok, but not great. The Kreighoff is a Super Luxus I have only shot it at 50 yds, It's accuracy is solid. I am just partial to the Blaser, here is my 100 yds target

Aleko