Lead is a reasonably priced high density metal. A lead ball of the same diameter as a steel ball will be approximately 40% heavier! This means you can pack more punch in the same size paracord creation. To see a recent example of this "punch", check out the video below where I used my lead ball filled monkeys fist keychain to start my kitchen demolition project. Now you can use the Exclusive Paracordist's Monkeys Fist Jig and my youtube videos to make your own Monkeys Fist creations!
From left to right for comparison purposes: 3/4" steel (0.9oz), 3oz lead, 1" steel (2.3oz), 4oz lead, 1.5" steel (7.9oz)