I make the hole 1/8" deeper than the tap con. I usually buy the tap cons that have a masonry bit included so i don't have to guess what size to buy with them.

I use hammer setting to drill the hole and drill setting for driving them in. Speed is set to 1 and i have the torque / chuck set to maximum. I like the ones with HEX heads. I use a hex driver with them.

I have never mounted a TV with them but i have mounted outdoor speakers, XM, FM antennas and satellite dishes.

Adding.. Once they are in.. they are in. Your not going to be able to back them out without snapping the heads off. In my experiences with them anyway.