ORIGINAL: RugerM77.270
With three 30 cals. I think its time to look at a .284.
7mm Mag for a canon.
280 Rem. if you want to go off the beaten path (its a very overlooked round).
7mm-08 if you want to replace the safe queen.
I would think that with three 30 cals, the 7mm's are fairly redundant.
I'd get a .243 Win...