"Seating" or inserting the drill bit, same thing. That's a term I saw used elsewhere. Sorry for the confusion. All of this advice is helpful and much appreciated. I did start with a smaller bit and as it turned out I needed to work up to a larger size anyhow so it worked out. So now I understand in the future. I'm not so keen on having the drill flip around in my hands so I can live with some slippage from time to time.
Has anyone tried this new adhesive product called Instantbond! It's a concrete bonding agent ( among other surfaces) , good for attaching screws to masonry surfaces. I bought some for future projects to attach twine and screws to support vine plants along a cinderblock wall. I saw a video on YouTube and it looked pretty useful. http://www.instantbond.com/
Have a happy DIY weekend everyone!