i don't know the freebore number, but i have two .223 AI rifles that will kiss at 2.45" ish with the 75 A-max, and they also take the 52-55 grain bullets to the lands with plenty of neck. the mag box needs "fixed" to run these, but that is as easy as removing the filler at the rear of the box and installing a .3" or so filler instead.
even my 1-7" Hart barreled rifle will shoot the 55 NBT and the likes very nicely. like clay pegeions at 550 yards. but with the 75 A-max, i can hit the broken peices of said clays at that distance.
my 1-8" Brux barreled .223 AI is better on all accounts. i just mention the 7" twist to show the faster twist is not too much a concession.
Guns don't kill people, drivers with cell phones kill people.
