I've been struggling a lot with this problem lately and have been doing some reading and talking on other boards and have come to the following conclusions. After much debate I have decided NOT to use locktite for the following reasons: 1) locktite sets up very quickly, too quickly at times, sometimes in about five seconds. This is is insufficient time for proper torqueing of the screws on a scope. You need to torque the screws and then go back and re-torque them again. As you tighten some screws the other ones become somewhat loosened and need to be torqued tighter. You can't do this with locktite. If you do use locktite you'll just be torqueing against the locktite instead of tightening the screws. 2.) After shooting your rifle with your newly mounted scope, you're gonna need to re-torque all of your screws again. Believe it or not, the shock of just a couple rounds on a newly placed scope may bring forth the need for tightening. 3.) with changing weather conditions your screws will expanding and contract with heating and cooling cycles (such as outside to hunt during deer season in the winter, and then bringing the rifle back inside at the end of the day). 4.) If you ever want to change your scope you're gonna have this locktite crud spread all over the screws and everything, making a real mess to clean up. 5.) If you put just a little too much locktite on the screw, you're not gonna be able to set the screw deeply enough in the hole becasue the locktite fills the gap and prevents the metal to metal contact which you need to secure the screw tightly.
So basically I've resigned my self to always having to re-torque my scope rings/screws. Much more often in my magnum calibers, and not as often in my AR. Get yourself a good torque handle and torque screw-driver.