It sounds much better than sand or concrete.

We used to have a lead pot that we would pour hot lead into stands and racks. It was pretty cool to watch. It would make a 10lbs Item weigh 5 to 10X more.

M80's VP150 QS8's Earthquake SuperNova MKV-15
Integra DTR-7.4 Outlaw 755 Outlaw M200's Outlaw ICBM