Boomie,
Am kinda new at this myself, but the supersonic numbers seem high to me. I am expecting more like 2200 with a 125 NBT from a 16" bbl. Which is adequate for whitetails. Will probably try them on piggies too.
The accuracy numbers I am just getting to a little bit. I've seen 3/4" groups with 147 gr FMJBT ball projectiles ... which isn't bad from junk and no tuning of the load at all.
All chamberings seem to have a little drivel associated with them ... with the possible exception of Jeffe's AR stuff that you can simply load to your recoil tolerance
Mike