I have a partial box of RWS/Dynamit-Nobel .22LR shells from my father’s collection. The box is labelled in English and German as standard velocity rounds. A label has been added to the box on the top that reads “LaufbeschauB-Patronen”. The person who passed them on to my father said that meant they were factory proof shells. I had a relative in Germany translate it but he is A) not a shooter, and B) a Polish immigrant to Germany so I’m not sure if he understood or could properly translate it. He said it translated to “Bullets for Barrels”.
Are these really proof/test cartridges or does the label mean something else?