I built one on a 700 with a Krieger 4 groove for a buddy. The Kiff reamer I used was built around the Hornady factory round using the 120 gr. A-Max bullet, kinda' minimum SAAMI deal with the freebore shortened a bit so the bullet wasn't jumping a mile...IIRC. It was a few years ago...
It shot the factory stuff very well, and my friend is very happy with it. He uses it as a deer/pronghorn rifle.