This is the system Aydt with the external extractor. The caliber will be 8.15x46R (very simular to the american 32-40). It was designed strictly as an off hand 200 meter target rifle. In Germany, you can purchase swaged bullets easily. In the USA you have to cast your own(the correct bullets molds are avialible from NEI, see there mold .318-175 #86A). This is known as a stop ring bullet. It is loaded into the case with your fingers until the "stop ring" stops it from going in deeper.
The 7.6mm refers to the bore, not grove diameter.
What got my attention is the case for the site. That is more rare than the rifle.
Hope you have a lot of fun with this one.
Scott
