I have to remove the stock from my 20ga PR to correct an issue from the factory. I have made a brass pin to drift the sear pin out and have the driver tips (Brownells) ground to the proper width…less .005 in width than the actual screw width & relieved on the edges.
I started taking it down and ran into a snag - one of floor plate screws will not come loose. I loosened them evenly but one of them is in there good. I soaked it with Kroil for a good 15 hrs with no luck and I tried tapping the driver with a small hammer as I applied torque, it’s just not happening.
My game plan is this - I have a Bridgeport mill - I’m going to place the receiver in a leather lined vise..mount the driver in a drill chuck or a collet. With the receiver in a vise and the driver mounted I’m thinking I will be able to apply consistent downward pressure to keep the driver seated proper while I use a strap wrench around the chuck/spindle to convince the screw to loosen. This should give me gobs of very controlled torque and I can take it slow & easy.
Thoughts? Any other tricks to try before going this route?
Here is a pic of the drift pin I made - it has a small lead in taper with edges relieved so it doesn’t catch any sharp edges. The taper should also help to engage the second sear easily as it is driven through.
* Reference - on my PR the sear pin measures .109 - I made my brass drift .107/.108
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