I dont know.

Folks building on a 700 should go to the 250 hull for maximum boiler room.

Someone wanting to go the biggest on the .478 case head would do the Nosler and should get exactly what they want in a 700 action using a 308 mag.

If one wanted the 700 with the ability to use 15 mags, they shouldn't tout the 223 hull, either. Like I said, the 75 Hornady Match is going to be as good as it gets for high BC bullets be it a 223 or 22 Nosler in a 15 mag. They're the same case length for all intents and on paper. Get a trimmer if the semantics require one.

Ive said all along the military should have made the 15 work for the 222 Mag case. Everything since then (take a look at how messed up the 223 trials were) has been a compromise and the need for heavier bullets that resulted has only made things more so.

The bottom line is that in ARs the Nosler case exceeds the 223 and does so at the same or less pressre

Getting the PPC case in that action surely is better for the marksman, but making it work everytime in military guise might be asking too much.