DWM is high quality ammo. For comparison, I had the Russian made 7,62 SKS ammo (newly made Wolf) stored in the same place, and 10% misfired because of humidity.
I told another gun lover acquiring this Mauser for shooting:
http://www.gunbroker.com/Auction/Vie...Item=144801980
He did it and he also acquired a single box of DWM 403 from CheckpointCharlies.com because he needed the DWM clips. Reported that two rounds (out of 20) in the box had cracked cartridge cases.
Probably I was super lucky. None of those in mine were cracked, and those 10 round that I tried worked well. DWM is obviously more strong than PRVI. It's louder.