Great choice for a cartridge to work with. The 26" barrel and that capacity ought to be about the most you can squeeze out of a 6.5mm with good barrel life.

If some pundit comes along and blows the .260 Rem out to a 30° shoulder so I can crunch in a couple more grains of H4831 and calls it "Improved" I might start looking for a gunsmith with that reamer.