Yeah, probably Cordite. Just burn it. Backyard, driveway...No le hace. It's not as good as a half-a-matchbox worth of black powder, to leave in an ashtray just before you leave the bar you don't care much for...
On bullet-pulling: My inertia-puller hid under something and I fell back on pliers, to pull some unknown 30-06 loads. Used the press, with no die in the way; ran the ram up, grabbed the bullet, pulled the ram down. The wedging action tightened the pliers and out came the bullet.
Little hickeys on the ogive-part of the bullet, of course. I figured they'd do fine as "plinkers". Loaded some; they grouped as well as brand-new bullets...It's amazing what doesn't really matter!