For good SAFE blanks, go to the craft/floral department at your local chain store, and buy the green floral foam. Use the WET type, not the dry. The wet is the smoother grained of the 2. Load your load of powder, I used about 35-40 gr 3F, then pinch some foam off, poke it in the cylinder, and ram. I found it easier to do this with the cylinder removed, using a wooden dowel. Fill the chamber most of the way with foam, and you get good loud safe blanks. I couldnt pop a balloon at 3 foot with mine, but did bounce it around. DM