I use a BigShot tumbler with 10 pounds of pins, 1 gallon of hot water, 2 tbsps Dawn, 1 tsp lemonshine , 100 pieces of brass for an hour and they come out great. With this volume, it doesn’t even fill the drum halfway, as you can still open the cap without spilling water. You could easily triple the recipe and the drum would hold it all. Great product!