Are you grinding up your charcoal or refining your BP to ever increasing F's? Here's a fun and odd BP factoid: Make your BP as accurately and consistently as possible. Measure out, either way, two exacting loads. Take on load from one end of your batch and the other from the other end of your batch. Doesn't matter if its top to bottom or left to right. Most likely you will get different results. Speed, accuracy, smoke or all of the above. Even more strange, a 5# batch or a 5oz batch will often produce these results. Of course it is a miniscule difference. My guess is its the spirit of the Black!