Last weekend I was experimenting with shooting different calibers at sheets of 1/2" thick "unbreakable" lexan polycarbonate sheets. 22 barely stuck in it, 380 barely stuck in, 9mm went through, 40 went through, 357 went through and broke it, 45acp put a big dent in it but didn't penetrate, 00 buck went through and broke it, 12 ga slug went through and broke it, 30-06 went through it, broke it into many small pieces and went through a small 3" tree behind it. What does this all mean? Nothing, just messing around in the woods