there was an article on a 5 gun rifle battery...
I believe it was...
243win
.280rem
.30-06
375 h&h
458 lott
this setup allowed for each gun to also have a backup on any hunt and hunt the entire world...
ie... if your 458 broke you still could get away with using your 375...
and vice versa.... if your 280 broke you could use your 243 or 30-06 etc...