RE: 270-08?
Why do it ? Why shoot the same rnd as every one else ,to be different.
IMO chambering the rifle would be easy if you stick with the 270 porfile , just use a 270 reamer and not insert it all the way ( about 1/2").
For the dies you could take a standard set of 270 dies and machine off the right amount off the bottom of the die.
Or if Redding dose not allready make that die set they will for a price.
It would make a sweet Rem Model 7 chambering.