Re: Castle Season 5 (including Spoilers)
Loved Castle's intuition when he saw through 3XK's plan.. it was his weapon after all. I'm no gun expert but can you distinguish shell casings of real bullets from blanks?
Ammo manufacturers intentionally make blanks very easy to distinguish from real bullets so shooters won't make silly mistakes like loading the wrong type of ammo. For instance, for the M-16 blanks are made from some kind of black plastic whereas real bullets have a broze looking metallic casing. So yeah blank casings are easily distinguishable from real bullet casings.
USS Sentinel, Luna Class (STO)