I'm new here so please be patient.
I purchased a Mark II Fv-Sr that was new used, 50 rds through it according to the PO.
I decided to clean it before taking it for a run. The action seamed stiff at first before the cleaning, but it's much smoother now. What I did notice is when I release the action and start to slide it to the rear it was hitting something that lifted the action slightly. I removed the bolt and noticed that the firing pin block had been peened over on the beveled edge where it was hitting on one of the barrel screws. I put some blue chalk on the slide and ran the action a few times and you can clearly see where it's hitting the screw that's protruding through the barrel.

Does anyone think it's a bad idea to remove the screw and either take it down a little (file some off), or remove it and loctite it with less torque this time??
I'll try to post pictures.