Been using the old heavy cloth lead shot bags longer than I can remember. Up till recently just added a light dusting of talc powder to allow them to slide when needed. Now that I am shooting my 460 with such a vicious cylinder blast, blew a new bag apart in 4 shots!!!, I have added a heavy leather sleeve to the top bag just for it alone. A 10# shot bag as my heel/rabbit ear bag. Work great. Sand in my home bags, new, clean cat liter in my work bags. Liter in a plastic trash bag first, then into the cloth bag. Plastic bag eliminates the dust that will seep out of the cloth bag.