Wads are available from Circle Fly (the wad maker) or from Trackofthewolf.com. I order specialty wad sizes from Track. If using brass, you'll have to measure the Inside Diameter and buy wands accordingly. With plastic hulls, you can use 12 bore wads. I pick up cases by the hundreds at the local trap club - free, and throw them away after one shot when using black powder. Fiocci and Fed. low brass blue coloured cases (not Blue Magic) have a separate plastic base wad and straight sided walls which work well with the fibre and card wads. Some cases, such as AA are tapered inside and wads become more difficult.