I still look at 500/.416 as specialty ammo however, the .416 Rigby is loaded by Federal, Kynoch, and Norma. That says alot. This is where I am torn, ammo avalibility is paramount to me, that why I opted for a .375 H&H in my S2. I agree the .500/.416 is a better double gun cartridge, but the Rigby is avalible, I even found it in Africa when a client's ammo was lost in transit and a local gun store had some on the shelf.

Aleko