Loc-Tite (or any other threadlocker) is not used by Savage. That's a common myth floating around the internet. Sometimes ...'crud' is not quite thoroughly washed from the threads prior to assembly, and the threads kind of seize. Kroil (or Liquid Wrench) soaking in for a while (minutes, hours, maybe days depending) will be helpful, but the biggest thing to remember when loosening a stuck fastener is to use quick, sharp blows with a light to medium hammer on the nut wrench. Don't use a sledge! Slow, heavy blows won't un-stick the thing, but they will bend stuff.