I've had two experiences with these excellent barrels, both were heavy .224 fluted. The first belonged to a pal of mine, was installed on a 788, and chambered for the .22-250. What was interesting about this barrel was that the gunsmith screwed up the chambering, and the chamber was cut visibly off-set to the bore. The fired cases ended up being the strangest wildcat you've ever seen. But believe it or not this thing would shoot into a dime at 200 yards on demand - weather permitting.
The other barrel was my 1:7 twist .222 on a M-700 action. On demand I could cut the chains which held the steel plates for pistol shooting at the range, calling first one side of the link than the other. This is by far the most accurate rifle I have ever owned.