9372,
The primers appear to be the Berdan M71, 6.45 (.245"). I don't remember the RWS number off the top of my head, but they can be identified by their diameter. I tried to locate a source for when my supply is exhausted but to no avail. Whether you buy the cases or not is up to you, even if not commercially available there is always the chance of finding some in an estate or on Ebay. If they are fired cases, you should determine if they were primed with mercuric primers. The German Sinoxide primers were non-mercuric pretty early, but I don't know about the others. If you can translate the text on the box, it should inform you. If you can buy some original ammo at a price you can afford, you should buy some. Their actual velocity (not advertised velocity) will be valuable information to judge your handloads by.
Mike
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