Ivor's observation regarding some Anschutz having rear lugs and pinned barrels is true .... and it puzzled me for a while. However I dont think Max and Rudolph's parents raised any idiots. Their reputation (and use by well regarded shooters) for accuracy is a fact. The decision to employ a press fit and pinned barrel was obviously done because, if accomplished with the right precision, it could result in consistently better alignment and stability (with low pressure rounds) than traditional threaded barrels and receivers.
The rear locking of the Match actions (54) is accomplished with only two lugs and they are the bolt handle root and a lug incorporated in a collar at the rear of the bolt -- oddly the the bolt root is at approximately 4:00 and the lug at 8:00 (approx.) which is curiously asymmetrical. You would think that the firing pressure would push back on the bolt and force the bolt face to tilt up under pressure. I believe that this is in fact what happens HOWEVER I believe Anschutz specifically accomodates for this and has designed the bolt face to fit snugly into the breech with particular attention to the 12:00 engagement AND its relationship to bolt face angle to the chamber - essentially achieving THREE points of stability for the bolt face which is quite symmetrical -- we may not understand all of the dynamics at work ...however it is very difficult to find fault with the accuracy of Anschutz rifles with match 54 actions chambered up to (and including) .222 Remington. I have a single shot Anschutz .222R with 54 action which surprises me routinely
Rear locking actions have often been identified as causing case stretching and while this may be the "case" ... some very accurate rifles have been based on this design ... Remington 788, 541, Steyr SSG (also a press fit barrel) Steyr pre-SBS (with threaded barrel other than SSG) Schultz and Larson .. and of course Anschutz .. so apparently they are not entirely without their merits?!?!