Bighammer

458 Lott and the reason being bullets, the 350 and 400 grain 45/70 bullets.

Have a look at a Hornady, Sierra and Speer manual and you will see 416 bullets are very thin on the ground.

Woodleigh also make a 405 grain flat nose.

The 400 grainers loaded back to around 2000-2100 with powders like 2206 is in the general recoil area of the 375 and smaller animals go down like they are electrocuted. I use to use the 400 grain Speer loaded to those speeds in the 458.

Also if you want to cast bullets (or have someone else do it for you) bullet moulds for rifle calibres abound in 30 calibre and you guess it....45 calibre.

One point on the 416 Rigby, the big cartridge does have a certain feel about it that just does not come with the H&H size cases.

Mike