Probably just a rumor, but I've heard that great care must be
taken when sprinkling 777 on lawns. Make no circle designs when
doing so, for they can turn into crud rings, and later picked up
by a mower resulting in broken blades. laugh

When Clear Shot was being made, no one around my area was
selling it, so I ordered 5# of it, sold a pound, and kept the
rest. Still have a couple pounds. One problem reported was
that condensation occurred in sidelocks sometime between after
a shot was taken and reloading. I was using an Encore and never
had that problem. Took several deer using it. Although not as
"potent" as 777, I didn't have to bust through a crud ring
after every shot, and it was just as accurate. I have since
gone strictly smokeless, or there wouldn't be 2# of it left.

If it were me, I would at least examine the stuff before
tossing it. The granules should look more like a smokeless
powder than BP subs. And if they are not sticking together,
I would try a few shots to see how it's burning. If nothing
else, it should be good for plinking.