Anyone who's read much about the machine rest testing of 22RF rifles should know that quite often, an assembled rifle will shoot better off bipod & bag or good stable front rest & bunny ear rear bag or a good one piece rest than it will when the bbl'd action is held in a machine rest - assuming the shooter has the skills to make the most of the rifle's accuracy potential. Lapua's Test Center testing is primarily to compare various lots of their own ammo in a given bbl'd action, and report the results to the owner. The possibility that a barreled action may not shoot as well off good rests when assembled as a complete rifle as it did as a bbl'd action in the machine rest exists - but I've never read of anyone who experienced that with respect to the result from either of the Lapua test centers. Lapua tests with the machine rests because of the sheer volume of the rifles customers bring or send in to be tested. Operator skill & fatigue from testing several rifles each day off rests would undoubtedly have various effects on the results, so machine rest testing is currently the best way to get uniform results. If one of the testers at Lapua isn't feeling particularly well-rested, or for whatever reason, isn't having one of his best days, the machine rest should eliminate the effects of such physiological deficiencies on that particular day.
That said, when I called Daniel Cliff at the Mesa Center after receiving his reports on how my Vudoo (which I'd barreled & chambered with a Krieger blank) shot, the results of two or three of the lots of Center-X were very close at 50M, but I felt one was a little better at 100M than the other two, and so bought two cases of it. It's never let me down in that rifle, nor in either of the other two V-22s I own - and the one with a Bartlein that VGW fitted & chambered with Mike's Ravage reamer shoots this lot of Center-X a tad bit better - consistently - than either of the rifles with barrels that I chambered with my EPS reamer. I have no regrets concerning my decisions to purchase these three rifles (with a V-22S action order pending) or those two cases of Center-X. If I'd have been a bit more flush with ready cash, I'd have bought three cases instead of two...