The .32 and the .36 both utilize the same size patch which is 7/8". You can make a patch cutter by purchasing a hole saw drill bit. Now the only thing is with patches, you measure the outside diameter. With hole saw bits you measure the inside diameter. Hubby made one by purchasing a 1 inch drill bit. You then grind off all the teeth and beveled one edge to be able to sharpen. Keep it cool by quenching in water. After he did this, he threaded a bolt into the threads at the top and cut the bolt head off. He then turned down a "wooden ball" on his wood lathe and attached it to the bolt for a handle. He cuts out hundreds of patches at one sitting in various calibers.Floomrider said:Wondering how big I need to cut the patches to shoot round ball in this thing?...I thought about buying patches, but I have plenty of material to make my own.