user 48702
Richard Turner
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The super glue (CA glue) needs to be the thin viscosity type. Titebond makes one as well as Loctite, both of which have a viscosity cps between 5 and 8. There are thinner CA glues as low as a 3 cps, but are more expensive. On hairline or thin cracks, the thin CA glues have a wicking property, almost as thin as water, and will migrate throughout the entire length, width, and depth of the crack. What I like about the thin CA glues is the fact that you can get into deep areas if needed with a hypodermic syringe.There is a crazy glue for wood you can get at certain hobby shops which seeps into the crack and then clamping the stock. I've repaired one using that stuff a couple of years ago and cannot remember the name got the idea from a wood working friend who repairs stocks. The hobby shop I got it from closed so I'll try to figure out what it's called.
The other stock was my bother in laws 6.5x55 Swede. It was in two pieces so I used an external wood glue and clamped it. He's been using it ever since with no problems. Maybe if the crack is big enough getting some glue in that crack with a feather or something like that.
Tightbond III is a thick glue, about as thick as Elmer's with a cps of 4,200 cps, and you will have to pry the crack open so you can get the glue in as deep as you can, then clamp.