Before you go there, if you haven't already. I'd take a good look at the trigger bar and trigger bar spring. Sometimes the bar is a little rough and the spring doesn't slide along it as smoothly as it should. That's a simple thing to address with some fine sandpaper or a nail file. I've not replaced a cam spring before so I really can't help with that if needed.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."