Here are some tips on screwdrivers, all of which I have learned the hard way:
- Never use a screwdriver with your gun unsupported, or poorly supported. Put it in a gun rest or a vise.
- The little hex and Torx wrenches that come with your scope rings are for emergency use only. It's nearly impossible to keep them in line with the screw as you twist.
- The screwdriver you got for 39 cents at the yard sale is eventually going to do damage worth a lot more than 39 cents.
- The best screwdrivers I've ever used, and I've used a bunch, is the 72-piece Wheeler Engineering Professional Gunsmith Screwdriver Set. It is superior on all counts, and if by some wild chance you can't find a bit to fit in here, there is an 89-piece set available.
- Driving a screw without considering how it is to be employed is an invitation to sorrow. Scope-base screws do not require the same degree of force required of scope-ring screws.
- Loc-Tite is good, but it's not always necessary, and it's designed to be used in miniscule amount.
- Go to a gunsmith.