I've never bought into the "first couple of shots center mass didn't do the trick, so I'll transition to a much smaller moving target". It's interesting in training, but I'm not sure how effective it'd be in real life with all the physiological changes that supposedly occur.
Exactly.
If they’re not dropping, it’s better to reason that you MISSED and keep putting rounds on target - CENTER OF MASS.
Most of us don’t get 100,000rnds per year of government ammo.