I have no idea why so many guys do a 280 AI some are the same guys who say a 270 AI is not worth it, maybe the 280 AI deal is fashionable, look at the AR 15 tactical crowd, its monkey see monkey do with them, this may be the same way
if you really wanna go faster on a 270 win case, do up a 270 gibbs
I think it has a lot to do with availability of components (dies and reamers mostly) and smiths who have them.
Its pretty darn hard to find .270AI gear plus a smith who has a reamer in the drawer. 280AI easy as pie.
If you really wanted to get into it the .280 has the slightest advantage. About 2 grains more powder, higher BC's , higher SD's and more bullet choices. That said its not enough to matter in a hunting situation but it is stuff that keeps you up at night. Or starts 50 page discussions in a campfire forum
