A cop I know ( an idiot incidentally) is recovering from a 9mm wound to his leg. Guess how it got there ? It was a hollow point of some sort. Idiot says, " Good thing it didn't expand or I probably would have died".
Two lessons from this. Never take practical or tactical advice from a cop who will let his drunk friends drive his patrol car and who will play chicken on the road with other cops from his department, knowing they will most likely not rat him out when they realize it's him.
When you are practicing your draw inside your house, UNLOAD YOUR GUN and practice your draw so often that keeping your ignorant finger off the GD trigger becomes muscle memory.