If your "stuck" with factory loads, i'd go with the 260, if you handload, i'd go for the 7-08.

I've shot a lot of game with a .243, but bullet choise is a lot more important with a .243 and with the other two cals.. I agree in a .243 100 grain Noslers partitions are best!!

I noticed a HUGE improvement in 6mm performance once i started handloading NP's !!! Same with my .240 wby..