I have shot a variety of stone types including obsidian into straw bales with no problem. Also I have used cardboard, styrofoam, and a store bought specialty arrow stop foam target. All were good on the stone tips, but many times the barbed heads cannot be pulled back out. They must be pushed on through. The only bad targets are the ones you hit accidentally, like the earth, a tree, or a barn side, LOL
those are really tough on stone arrow heads!!!