RE: 270 or 280
I'm a die hard .280 fan and have used my pet .280 to kill everything from woodchucks to Alaska bull moose...
However, I'm also a handloader...My .280 has never had a factory load fired through it...
If I were NOT a handloader, I'd prefer a .270 over a .280 because of the much larger selection of factory loads that are available for the .270.. Actually, with equal or similar bullet weights, the performance of the two cartridges is so close that I don't that you or the game would ever know the difference in the field...