Correcting Timing on Roll Pin Screw Slot

[J. A. EARLY]

I can see why they remain out of time. I've tried to turn the screw using the proper size Brownell's bit with both the Brownell's handle as well as a Chapman ratchet attached to the bit and it would not budge. In my estimation the receiver I have had the roll pin inserted incorrectly before the receiver was recase colored and the pin will probably stay as is forever since to turn the screw slot with even more pressure is going to result in some damage somewhere. Has anyone else experienced this and what is the solution other than just quitting? Thanks.