“...smokeless black powder...”
Say what?
Remember ‘reporters’ ain't the brightest of God's creatures.
After all, in his eyes all powder is black and modern powder is smokeless. Ergo, Smokeless Black Powder.
I did not see anything that told me when the powder was first stored. My guess is some of it has been there since WWll and is smokeless.
6,000,000 pounds is a hell of a lot of powder, smokeless or black powder.