The on shoulder forward carry African method is common. When a porter rarely carried my rifle for me. I always unloaded the chamber. The PH and porter liked that by the expression on their faces. When I carried in likewise I tried to keep 5he barrel pointing safely.

A double barrel is more difficult as reloading it takes longer. A reason one of the decocking doubles eg Krieghof or external hammers, are such a good idea. Carrying the double chambers loaded but uncocked. Not just a lesser unreliable safety. I don't own any internally uncockabke DRs.