In the interest of 100% reliability, I don't use the over travel screw since I've had them back out when they are set at the minimum.
I don't think your over travel will affect the hammer / sear engagement. It's usually that the overtravel is set just a little bit too long for the trigger to work
You may have a different problem
If you are worried about the blue loktite, hit it with some heat before you adjust. I don't think you'll have a problem breaking it free.