I use cardboard targets and bottles filled with coloured water as the two primary things I shoot. Sometimes some fruit or something, but not often. What I'm looking for is to see what makes for good targets. I've found a couple of things for a "homemade" ballistics gel (basically just REALLY high-density gelatin). I was also thinking of using something like the spray-foam insulator. That stuff seems to set up pretty solidly. Any thoughts? Is the insulator TOO solid to make a good target? What would you guys recommend for things like this to shoot at that might even be able to demonstrate JHP expansion?