Geez, REG. You have killed two "once in a lifetime" bulls - three years apart! When you look at the performance of the .280, the 7 Rem Mag, and even the 7MM-08; they are a lot closer in performance than their case capacity suggests. For every couple hundred feet per second of speed, you gain about a hundred yards more effective range. Any of these rounds, with a good premium bullet and good shot placement, is more than adequate for the biggest bull in the woods. I would just try to limit my shooting to distances where the muzzle energy is still up there around 1500to 1600 foot pounds.

How far were these two lunker bulls when you shot them?