RE: Sighting in at 300 yards ??
A free floating barrel means just that. FREE FLOATED. It should have no contact all the way to the barrel lug. Is the lug bedded?
1 7/8's" at 660 yards with a bipod. Not even a tripod. Are you shooting off a hard surface? I live in Morgantown, WV. I have my own rifle range out to 540 yards. I would sure love to see someone shoot like that. Tom.