I have just bought a S/H CZ 22lr and it won't eject live rounds made by CCI & Eley but will eject Winchester subs, I measured the heads and the Winchester are 0.002" smaller. I stripped and cleaned the extractor jaws they look OK but I suspect them.   Anybody had the same problem and know the solution and if its the ex-jaws where can I buy some and how much, many thanks.