Lee,
What actually is your point?
I can see you have highlighted an except about the new 54.3 chamber and barrel threading. Neither is new to the 54.30. Many European target rifles featured a pinned barrel, but not all. Bleiker have always threaded their barrels and receivers. Again with the chamber, who else used a two part chamber? Was it Walther? Was it FWB? Was it Diana? Oh, yes it was, Bleiker!
Anschutz redesigned the 19xx 54 to tackle complaints of inferior ergonomics and accuracy compared to other ISSF rifles. Walther were certainly in their mind, but Bleiker were foremost. Top ISSF shooters were switching to Bleiker from Walther too; Brodmeier, De Nicolo, Zublasing spring to mind.
Yes, the Walther KK300 bolt is shorter than a 1913, but the difference is 1/2in. The Bleiker is some 3in shorter. Bleiker placed a great emphasis on th3 accuracy of their Lilja barrels. These may not be the hottest thing on US BR circles anymore, but they weren't Bleiker's market anyway.
If you wish to accuse me of lying come out and say it, and let's stop beating around the bush.