Ran across several "Bed your action & bbl with JB Weld" videos on The Great Teacher of the Intertubes, youtube.
Reading up on it, it seems JB Weld is better than most options for this task. I was wondering, however, if a good filler option can be found at Lowes or Home Depot, where I buy my JB Weld. I have used baking soda with CA glues, but that hardly seems appropriate for this application.
I will start with the kids' Crickett Rifles, especially since I have an extra stock.