Given you have to use a long action to build one, and it’s a bit shorter and fatter than a 280AI but gets the same velocity …. It may help with OAL, but the reality is all those longer bullets are seated to far down even in the 280ai…
So - if your smith has a good 280AI reamer, it will probably mirror what the 7 PRC will do accuracy wise…
Keep coming back to a 1:8 twist/long throated .270 Win., with 150 gr. ABLR's.
At ~ 3K fps at the muzzle, it would be a 600 yard elk, and 750 yd. deer rifle.
Probably about the same w/ the 165 gr. ABLR as well.
GR
