After I tried a hand at this, I've Been wanting to make my own charcoal in larger amounts. The barrel method works but the vessel itself is not as air tight. Really I finangled two kerosene barrels together 5 gal, and the heat may have been a bit much for the gauge. Started flaking off so I need to find something that will work better. I do have something but its holding wood right now. The reason why I am asking to make charcoal and get some pointers is to know likely what wood is to make charcoal for cooking and which is for say forging. I have black locust and some say this is good for charcoal but others say not for food. So which is which?