Anyone have / had any experience with these barrels. I have been doing research on them and am reading the Select barrels are made by either Black Hole, Shilen and I even read Pac Nor on one site. Depending on which site you go to obviously one must consider the source. I know thier Ultra Match is a Shilen blank but I am courious about the select modle. Prodiving the person behind the trigger does his job properly using 168 FGMM what kind of accuracy can one expect say 100-500 yards? I am helping a friend with a build.