The half cock notch can eventually give you an undesirable trigger pull (heavier) due to wearing down on the critical surface of the sear. It isn't there to carry "half cocked", it is there to prevent a discharge if the hammer accidentally falls without the trigger being depressed. My advice would be to carry it hammer down on an empty chamber, and practice "Israeli draw" which is where you rack the slide as you're bringing the pistol up to aim. I've done it before and it isn't as bad as it sounds, in fact after practicing it, it wasn't any slower than regular drawing. Trying to thumb cock a 1911 with a beavertail really is a chore if you're doing it in a hurry... in a SHTF situation, you aren't going to be thinking clearly and could possibly screw something up. Also when the hammer is DOWN, the safety should not physically be able to engage! If it does, there is something wrong with your pistol. the 1911 does not work that way!