Hello all! I posted these pics in the munitions forum, but nobody could ID this round and they suggested I ask here.
The headstamp is: eej (@ 12), St+ (@ 3),4 (@ 6) and 43 (@ 9). The first shoulder is the same as a 7.92 Mauser, but then there is a second shoulder for the small plain lead bullet. Bullet looks to be in the 6mm range. Thanks for your help.