[Alpo]

A squib is an INTENTIONALLY underpowered load. If you forgot to put powder in it, that does not make it INTENTIONALLY underpowered.

A squib can be a dud. If you intentionally put a very little amount of powder in the case, and thus did not make the round powerful enough to get out the barrel, it is a dud, even though it is also a squib. That does not, however, make all duds squibs.

And as for "the military calls it" - the military says you piss in the latrine or the head. You eat in a mess. You sleep in a rack. You wear a cover on your head, and when you police the area you wear either fatigues or utilities. Me, I piss in the bathroom, eat in the dining room, sleep in a bed, and wear a hat on my head, and when I pick up trash in the yard I wear jeans and a tee shirt. What the military calls it means absolutely nothing.