My own 404J is built on a 1909 Argentine & the COL is actually slightly less than the 3.6" of the 375 H&H so the Jeffery works in a lighter, trimmer action. Ballistically, nothing to it if you old it to original specs.
Now, I was quite surprised though that probably the most famous 416 Rigby of them all - Harry Selby's was built by Rigby on a ex military M98 action and not a genuine Magnum Mauser. Wonder if they used 2 actions and welded them back together?
regards,
JohnT
