DO NOT USE THOSE PRIMERS! (no offence intended to Canada Ammo!)
The Dominion Berdan primers are much shallower than the Standard NATO Berdan primers. They are intended for reloading 7.62x39 only!
I bought 2,000 from Canada Ammo thinking that they would work. They are the right diameter but much too shallow. They are also very thin brass. I tried a few to see what would happen and the charge was blowing a hole right through the primer where the firing pin had struck.
So, I started researching Berdan primers and discovered that the GP11 cartridge uses Berdan 7.62 Standard NATO primers.
Others both make these. The other are more readily available and cost $31 less per thousand...
I am now using the other primers which I purchased from another supplier
The other are a double-walled design (hard military type primer) and they work great with GP11 reloads.
Now, if I could only get the PRVI B-345 bullets...