Stan, for the quick repairs the CA is really good. For stocks that are oil saturated, use the two part epoxy. I have 30+ years of day in and day out experience in doing what you are doing now. The rub comes from the oil that doesn't leave the stock.
I have one Rem 48 stock now in process as an example. The glue bond came apart because the oil from within caused the bond of the glue to separate AFTER I thought it was oil free. Oh, I soaked in for many times in acetone, used whiting, heat lamps to bring the oil to surface,water based engine degreaser, and finally acetone again ( many times) before the bond held. In all it has been eight months of frustration getting the oil to finally stop creaping out of the INSIDE of the stock. This has been an exception instead of the rule however. Again, I suggest you use the two part expoxy.
On your second question about the sawdust filling the gap. Use may use either CA or epoxy to accomplish the task. For a better result, don't use the sawdust from the stock you are working on. Instead use a lighter sawdust from a similar wood source. The wood dust from the stock you are working on will turn darker than the stock wood AND cause the glue to set up faster than normal. If you want to make the patch look like the wood you are working on find a lighter colored wood source for the coloration medium. Using less dust will work but it is difficult sometimes to guage just how dark the material will turn without trial and error.
Dennis Earl Smith
The Stock Doctor
