I mess up lug holes, at least one on every gun. I drill the errant hole out and tap it for a small brass or steel machine screw, I counter sink the screw hole in and out slightly, screw in the screw coated with solder paste and solder it into place. I cut off the excess, peen the screw into the countersink and file the lug smooth, probably overkill but it works for me.
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On my precarve rifle from hell something moved when I drilled the front lug hole on the trigger guard, I ended up with a gap I could see daylight through at the front lug where it met the wood, that wasn't going to cut it.
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The patch cleaned up;
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Everything is nice and tight now.