Stupendous Man wrote:
I have to drill safety wire holes in a dozen bolts every month or so. I
have a jig to line it up and use an air drill.
http://www.aircraftspruce.com/catalo...rillingjig.php I bust
an HSS bit nearly every time, not bad for 36 holes. Since it always
breaks finishing the hole I can usually drive it back out with an
automatic centerpunch followed by a pin punch.

Yep, that's my experience as well.
(Butt cheeks squeezed tight or flappin' inthe breeze)