I recently started loading the 7.62 x 39 with my own cast bullets. This has been successful based mostly on C.E. Harris' work.
I've used the Federal Match Large Rifle primers because that is what was available.
I shoot from a Chinese SKS.
As I've been looking into the tight S&B primer pockets, I've read many posts about slam fires with the SKS and regular primers. These posts seem to indicate that for auto loader military rifles the #34 CCI should be used because it takes a harder strike to ignite.
I've not yet read up on the particulars of the firing pin - but this seems to be due to the design of the military pins. And, further, some of the comments seemt to indicate that it becomes more of an issue as the firearm components wear. There seems to be some type of tool and/or measurement that can be done to determine the condition of the firing pin in these actions.
I've put through a few hundred rounds without incident. I just wondered what opinions and experiences were with this - specifically with the Chinese SKS? I do recall reading that these primers were definately recommended for the Garand.