Think you are right. I looked up case dimensions and it matches on every measurement for the 7 Mauser
Thanks everyone for the help. Going to incorporate it into the habitat for my rams mount. Seems appropriate to include a piece of sheep hunting history found near my ram.
My bad for not including OAL. It is about 2 1/8” long and next to a 6.5PRC brass for comparison. Quite small and definitely not a 30-06.
The Headstamp is EH sigma 1907. I’m guessing it is some sort of military round of sorts?
Found this old brass from 1907 while sheep hunting and I was wondering if anyone knows what this caliber is? Found in the cliffs not far from where I ended up shooting my ram. Pretty cool to find evidence of old sheep hunters.