I forgot to mention it was for 9mm Luger.
A VERY long time ago, The Old Man scored 50 rounds of 9mmx19 loaded for the MP-40 Schmeisser. He fired it in his P-08 Luger, and it was so hot that he could fire, and the cases went straight up, so high that I watched him glance up, and actually bat the empty sideways, with his other hand, as it eventually returned to Earth...