(2) the extractor is angled relative to the cartridge and cams in as the rifle is opened to engage the rim,
Not Blaser, but I have a BRNO 502 in .308 and had one in 30-06.
Both basically "caught" the rim on chambering, and cammed the round into the chamber as the action closed.
Not being an engineer, the extractor looked like it was cut a little taller for this purpose.
Both extracted without issue.
