Today I was shooting my homemade arrows with my 30# bowat some construction sign I found in the road. It is made outof thesame material as a stop sign, and about the same amount of thickness and everything. I was only 18 feet away when I shot an arrow and it went wide by 1 foot or so. My next shot nailed the sign, blew it back, and the wooden arrow tore threw the left side of the sign. It was amazing. How does a 30# bow let wooden arrows that are so fragile penetrate and blow through thick metal like that? It was pretty close, but not point blank range. At 18 feet it should not have done this, not that much power. Now my arrow that took me a while to build has a split tip, it looks like a bullet when shot into a wall. I know it was dumb of me to shoot an arrow at metal but I was bored and expieremneting