Goodtogo,
If you live in a dry climate, the stock will shrink. I experienced this with both of my TX200(s). The first was in Pueblo during the summer (+107F) and the 2nd stock shrank in northern Maine during the winter (-20F). Both of these climates were exceedingly dry. I had cleaned the screws, applied the loctite and then tightened the screws. I did NO shooting and a week later the action was loose but the screws were loctited in place. Once the stock settled, I cleaned the screws, applied loctite and then tightened the screws again and the action has remained tight.