I dont know which factory chinese I used, but it was complete horse turd.
SVT didnt cycle. FTE and stoveiping. The steel cases were so thin the casing would not come out of the chamber!!
So I used the rest in my mosin, and it was extremely smelly and dirty. 1 out of 5 didnt fire. Harder to work the bolt, but not as hard as the SVT with the fluted chamber.
If I find the factory code for this chinese ammo I will let you know. It was the worst ammo I have ever used. Edit: it is 55/71. 55 at the 12oclock, 71 at the 6.
I have used russian surplus, MFS, Sellier and Bellot and LVE. All with no complaints.