Shot some 42g Winchester the other day and no issues. Could be bad batch of Eley or maybe the rifle just doesn’t like them. Either way, good to hear a range of views and recommendations from members.I have used thousands of Eley sub-sonic rounds and I have never had a misfire. I have tried all the other major makes, but in my CZ the Eley are the most accurate. Did you have a bad batch, or have you a rifle problem ?