Not sure if this is directed at me, but I've used the EZ-LOK brass inserts in 10-24, same as pictured in your link. I tried 3/8", 13/32", and 7/16" drill bits. It's been a while, but if memory serves, the insert was basically impossible to drive into the 13/32" hole, but felt a little too loose in the 7/16" hole. I used the drill press for driving the inserts, same as others have mentioned. Also, I can attest to the fact that the bolt can be very difficult to remove from the insert when you're done driving it if you don't use a spacer nut.
That's just me, though... other people seem to have better luck with the inserts.
Thanks for the info. Maybe there is a metric size drill that will be closer.