Yes, all these ideas work to a degree but it still takes 1/2 hour to drill a 1/4" hole including a lot of backbreaking force. I was told by an installer today that the carbide drill bits dull quickly if you go to fast and/or once you hit the masonry. That might explain why I have varied success. He suggested using self-tapping screws to drill through the metal and then follow up with masonry bit to complete the hole. Throw away the self-tapping screws and use a new one on each hole. I'm going to give this a try. Also, I failed to mention I am drilling very close to the beam edge so the metal mech may be of higher density.
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