Feeling for Muscle

I know the golden rules of injection and haved followed them flawlessly but i was wondering is there a feeling or sensation you get when you know you have entered the muscle with the point?

I hardly feel anything past breaking the skin, really the only way you can tell if it is deep in the muscle is checking the needle depth. If you are in the muscle, then the needle is in the muscle, that easy. You might hit nerves or feel funny pinches (like when I hit my biceps) but no way to know how far you are into the muscle unless you look.