My gunsmith is encouraging me to go with a Lilja 3 groove. What is the advantage of the 3 groove? I have consisdered a McGown or Shilen as well. Basically due to time constraints and seeing what is available I was thinking McGown prefit for my savage. My other option is to have him cut back and rechamber my current barrel until the order cycle time has been met on a new barrel such as the Lilja.