[noelf2]

Good link. One other consideration, and what I do to make sure that I get some consistency after corning my powder, is make sure I weigh my black powder charges rather than relying on volume of powder. My batches are not consistent in weight to volume from batch to batch, but they contain the same ingredient properties. In other words, weighed loads are generally consistent in power but no so consistent in volume from batch to batch. I only corn powder that I will use in pistols and revolvers. I don't corn the powder I use in long guns and shotgun shells. Another area where YMMV is the need to use sulfur at all. I make a powder just from home made charcoal and potassium nitrate. Sulfur only serves to lower the ignition temperature, so, it is more suitable for flintlocks. If you can throw enough fire on the sulfurless powder (with percussion cap, primer, etc..) you don't need sulfur. I find it works fine in shotgun shells.