In my double rifle battery I am seriously considering a .416" bore double. I am loking at a .500/.416 or a .416 Rigby. I am very fond of the Rigby round since I have over 500 rounds of amo, dies bullets, etc. I am concerned over the longevity of the .500/.416 and the avalibilty of factory ammunition. I kno the debate over flanged verses rimless but i can see the merits in the Rigby as a double rifle cartridge. Any comments would be appreciated

Aleko