i chuck the set screws in my handheld drill. last time i drilled some, i actually just put the drill bit in a regular vise, set screw in the drill, drill in one hand and the other hand spanned the drill and the vise to keep steady...
also, most common i think are 1/8" long screws for IFR's and 1/8" or 3/16" long screws for the t-slot
I may have gone 3/16 but the shoulder[on press in jet] would have made it very deep so 3 threads are shallow and 5 are full contact on the set screw.
