I'm considering buying a German Aydt from a friend. This rifle has an outside extractor and appears to be chambered in 8:15  X  46R but the chamber does not have a rim-recess, it looks sort of like a Maynard breeching.  The rifle is in very nice condition and appears to be original.
  Is this breeching system original, every German Aydt I see is somewhat different.   HELP---  thanks for any and all info ---  leadball

The gap between the Aydt breech block and the barrel face frees you from depending on factory 8.15 x 46 R cases or from turning down the rims on .30-30s.  I shoot mine with cases formed by just running .30-30 or .32 Special cases into an 8.15 die and fire forming.  It's been years since I made them. I may have trimmed them but cannot remember (old age!!). Present case length seems OK on mine.

Richard