Cameron, when shooting RST 7/8 ounce loads in my 16 gauge A-5s, I store the friction ring in the top drawer of my dresser. Everything works great and I don't think I am doing any damage to the gun. One trick I have learned about A-5s and light loads is to saw the rings in half to lessen the friction more than I could by just changing to the "light" setting. Just install a half ring for light loads and put the other half in if (not likely) I would want to shoot heavy loads. Roy, my RST list is a couple of years old and I have no idea how to find it. Maybe Morris Baker or Alex Papp would provide you with the latest figures. I have heard that RST now does their own pressure testing on site and my list of pressures was provided to me before they started testing themselves. I really love the 1 1/8 ounce tens in my big Damascus guns. I have to pull both triggers to get the recoil up to normal level.