A friend has an H&R model 929 .22 cal 9 shot revolver that was having several light strikes. I replaced the mainspring with one from Numrich, still getting light strikes. At least 3 out of 9 every time, they will fire the second time around. Also, after firing all 9 rounds, the spent casings will not eject from the cylinder. I have to push them out from the back of the cylinder. There is also some play ( back and forth) in the hammer when it is in the fired position.
I was told it had not been fired much in the last 8 yrs.
It wasn't cleaned/oiled before it was put in a safe last time it was fired. No corrosion but very dirty.
I used Winchester .22 LR to test fire it after a cleaning and new mainspring.
My questions are,
Why would I still be getting light strikes after the mainspring replacement?
Why are the spent casings getting jammed in the cylinder?
Is the play in the hammer normal? Should i be looking at the sear components?
What can I soak the cylinder and other parts in that will remove the buildup and not the bluing?
Thanks