Bass, I'm glad I'm not the only one who wakes from a dream at 2:00AM thinking "OH, what about Lil 'Gun?". I've actually gone downstairs in the middle of the night and run a few powders to check pressure, velocity, and burn curves or to alter the seating depth/shot start initiation pressure to see if I can bump or reduce the timing of the peak pressure. QL is not an absolute and only a guide, but with a good chronograph you can actually verify to some degree of accuracy the predicted pressures. Sometimes I tweak the powder charge down or up so that predicted velocity matches what I was actually seeing, then look at the pressure prediction again. Only one time so far was I rudely surprised by an over-pressure situation with a reduced starting load based on predictions; Longshot behind a 500-grain Lee bullet does not predict well at all in the .458 SOCOM, but Herco, 2400, HS-6, and True Blue were SPOT ON with grains of powder vs. muzzle velocity. Being able to check actual muzzle velocity with a MagnetoSpeed chronograph is helpful to the accuracy of predictions, it's amazing what the difference in velocity can be between one foot and 10-12's from the muzzle.