Aahhh yes, the answer to age old question of how many layers of the jeans in the back of my closet can a bullet go through haha. More seriously though, did you intentionally not put a weight in the bottom to prevent it from tipping over? Were you worried about the rounds hitting it if you did?
I wanted to see how much force was created and experiment. The next version is shaped different and not top heavy, also the layers are spread thicker in the new one. Interesting tests for sure.