I own 4 barrels that were made by the MGM guys...albeit Contender barrels. They are of the highest quality starting out with a Shilen blank and chambering it any way you'd like. My .204 Ruger barrel in particular is a prairie dog smacker out past 400 yds. with little trouble. But you expect that when you shellin out $450 plus for justa barrel.
They are my first choice in after market TC barrels....and I have a few.