When I load Swiss 1-1/2 B.P. I try to keep the compression uniform from one round the next. I drop the powder into the case from the scale pan then put a wad just inside the case mouth. I then tap all sides of my reloading block for about 60 seconds to settle powder before I finish seating the wad. The powder column in each case seems different and I figure that that changes the amount of compression I get from round to round. Using a compression die could equalize my powder column , but it would also have different amounts of crushed powder in each case. Everyone talks about correct amount compression in thousands, what am I missing.