Need some help please. I have a monte that is failing to ignite primers about 20-30% of the time. I am guessing hammer spring but wanted to ask before I start throwing parts at it. I took the bolt apart and made sure the firing pin channel was clean and put a small amount of oil on it. Not sure what spec on the firing pin is but it looks okay and seems to be coming far enough out of the bolt. It is doing it to factory federal bulk rounds, didn't test it on any others but the misfired round can be put in another gun and shoot just fine. I have had this gun for a couple years and it has just started doing this recently.
Thoughts?
Thoughts?