The thing about this whole ordeal that made me the most mad is that someone was on my back patio, no more than a foot from my back door and could have just as easily kicked it in came in and robbed us. So after telling some people, I learned of these slugs. Made about a dozen and boy are they bad to the bone.
Here are some 3" Black Clouds I made. I used #2&4 Steel, Black Cloud Flightstopper & Flightcontrol Steel, and #7&9 Lead BB's. The 2 3/4" shells did some work so I can only imagine what these will do.