Eprobertson1
Sharpshooter
Don't know if you have checked this or if you already knew - When you cleaned and oiled the pistol, did you remove the spring from the barrel? Even if you didn't, check to make sure that it isn't on backwards. One end of the spring is smaller than the other. The smaller end should go onto the barrel first. I found this problem on a friends Bersa that was doing the same as yours.