Let us know how you like them. I'm also trying a method that would do away with the tape. Make a slurry by mixing rubbing alcohol and the chaulk, and pour a bit into the recess on top of the clay. The alcohol will evaporate leaving the chaulk sort of "attched" to the surface of the clay. Hopefully when the clay is hit you will still get the "puff" of colored powder.Thanks for the video! Anything that gives a reactive response from being hit is good in my book. I think this would work with a rifle, or pistol, bullet also. I will get one of those "Y" stands for clays, and give them a try.