470NEBD, In my experience, when you hear someone telling you a Merkel shoots loose with a chambering of a cartridge that was designed for double rifles, they usually have shot handloads that are too hot for the rifle, or they have something they want to sell you! Usually it is the second reason.

I don't think you will find a German made rifle that is too weak for the rounds chambered in it from the factory, and Merkel is no weaker than any rifle that is proofed for the round it is chambered for. A full 90% of the doubles that come "off face" do so because of poor care, causeing wear in the henge pin area, not from high pressure from proper loads!