I like Krieger, but the Ron Smith barrel on my .375 is pretty darn good. This thing shoots better than any .375 could reasonably be expected to, and sub MOA groups are not uncommon. The Gaillard barrel I had on the .222 made it the most accurate rifle I owned until I had the .308 built with the Krieger. The Smith, Krieger or Gaillard would all be good choices. I have a Lilja barrel on my .243, and while it is better than most factory barrels, I doubt if I would buy another.