I use three sizes -- bean (about the size of the end of my thumb) -- the next smallest goes through 1/2 sifter -- the smallest doesn't fall through 1/4 inch "french fry basket." After I get a good bed and very hot fire I use anything I can get through the door.
All of the above in my coal fired "Donkey" -- see Steam in the Garden several issues back. Jim Crabb Seabrook, TX (next to NASA)
