Ammonium nitrate and aluminum powder. This is the same thing as Tannerite, very fun to shoot. I blew a divot out of the dirt at the base of this log with a little bit of it, then I packed two 2-pound bags in there nice and tight, one on top of the other. I guess it worked kind of like a cratering charge. Blew a tunnel through this big old log big enough for my big a-word to crawl through.

The rifle is my Ruger American Gen 2 .308. I love that gun.