Hi Buck
I had problem with them, can't budge the screws, with my rifle too. But what I did is I got me a can of Kano Kroll and dab a bid of the oil on the screw and lay on the side and let it sweep in the hole for about 3 days, and if still won't budge give it couple more days. That should do it but beware those screws are soft.
Razorback Joe