Robert,
The 6.5-06 doesn't erode throats very fast, in fact not as fast as the more popular 6.5/.284, because of the longer neck. In theory it would erode faster than the .270, but there would definitely be some overlap in the life of individual barrels.
AI'ing doesn't solve the short magazine problem in the .260. That's exactly why the 6.5 Creedmoor was developed.
If you're not concerned with shooting moose or woolly mammoths, or shooting beyond 500 yards, the .25-06 is a very fine hunting round. It's normally very easy to find accurate loads, and from a 24" barrel 100-grain bullets can easily be started at 3300-3400, or 115-120's at 3100-3200.
