Re: Bell & Carlson A2 rear trigger screw
Walmart sells Loctite 2 part epoxy in a two tube syringe type arrangement. I have used this product for similar repairs on a B&C stock with good results.
This product dries hard, but you need to do your fill in layers. I find it easier to fill holes with this product than less viscous products like JB Weld, etc. Less tendency to have voids.
Once it has set up, redrill the hole and you should be back in business (just don't drill the pilot hole too big).