nitro - seems there may some cartride compatibilty issues with 7.62 x 39. I understand that SAAMI specs call for .308" bore/projectiles?? I have been told that US made sporting rifles such as Rugers etc, use that bore size, but ex military surplus ammo is .311".

I understand that Winchester Australia had to send back a delivery of CZ 7.62X39 Carbines because they were chambered to SAAMI specs, and were incompatible with the the surplus ammo that flooded into OZ when SKS's were legal.

It would be prudent to check out what these new jiggers are compatible with?