visit www.brenneke.de and go with question to info@brenneke.de
they making mauser 98 rifles in different grade ask for a price, this is a classic gun and of course you can contact brenneke in english language.
the Blaser R 93 system seems to be sensitive in a special way for pieced primers. so gas can open the bolt when come back. in spring was an accident in germany when a hunter get the bolt in his head. you can imagine what for horror storys going around. Blaser had saing it was a overpowered handload but other one's say it was factory round.