Has anyone built a rifle for this cartridge?  If so, what action did you use and what modifcations were necessary?  How is the performance?  I'm thinking of building one on a left-hand Ruger Mark II.  What's your opinion?  Seems like a really nice case that could be used in a standard length action and almost duplicate the 375 H&H.  Any thoughts on this or am I just having another elderly moment?  Thanks for your thoughts.
                    Panhandlepr