My thanks to Thor, Mr. Sabato and Lugerdoc for their advice. I will investigate over the weekend and be back in touch. The pistol has an original 1917 DWM top half, including the toggle, but I have been told that it is an Erfurt bottom. I'll report more when I get a chance to look at it again. As far as the ammunition, I have shot various commercial, probably Win., Federal, etc all all of the brands make it jam like I described. Thanks again.
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