I found this today. Looks to be a 7.7mm rifle round instead of the British made 7.62x54R on the last one.
Falcon: I think it’s a 7.9 m/m Mauser, probably Chinese. The Japanese 7.7 has a slightly more distinct shoulder than the Mauser and the bullet looks like the 154 gr. S-type. Jack
Looking at it again I think it is a 7.92 round. I hadn’t thought of that.