Justin. The first four milk jugs measured 6" from front to back. the next two detergent jugs measured 7-1/4" then there was one that was 4-1/4" and 11". By my calculations the bullet went approximately 31-1/4". With the majority of the damage being in the second milk jug. When we do the ballistics gel test I would like put some milk jugs, with water in them, behind the block to catch the bullet. Let me know when you want to make some up and go test them. You might see if you can borrow you buddies hd camcorder again.