Is there anyone who sells American made 7.62 by 39mm ammo?
My Son has a Mini-30 and it won't chamber the European ammo because of the bullet diameter difference.
Either size bullet will chamber in any Mini. If the rifle the OP is referring to won't chamber anything, it's likely some other problem like a broken case.
No case is stuck in the chamber, the rifle just won't chamber the European ammo without pushing on the bolt handle.
I emailed Ruger and they said their rifles are chambered to saami spec and NOT to fire the European ammo because it can cause pressure spikes, this is from Ruger itself.



























