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J.R.@A&M wrote:Notwithstanding my "C" in organic chemistry, wouldn't smokeless powder be a combustible versus an explosive? I will not ask that question of the fella guarding the entrance to the Brazos Co. Courthouse.

Might be, but if so, still be sure and remove all primers before entering ... they might be explosives

I'd guess that most cartridges which have a primer and gunpowder and bullet in them, contain explosives.
In places where explosives are forbidden by some law or another, I would guess that includes ammo which contains explosives.
So, I wouldn't carry ammo in secure areas of airport.
I hadn't thought about not carrying ammo, or my knife, into the high school auditorium/college building, though the gun is in the car in the parking lot where they force me to store it for easier access to car burglars who would otherwise have to reach inside my pants to get my gun.