“Ok, dummies. Not much of a difference”
BIG difference! Blanks have a charge and no bullet.
Dummies have a bullet but no charge.
Even so, we are talking pedantics when the issue was Baldwin’s failing to ensure the guns were armed correctly. An actor is supposed to trust his producers, but Baldwin, being the producer, is supposed to ensure safety on the set. It was his job to check those guns and not just leave it to the armourer.