The problem most people have with QL is they think it is plug and play. They get discouraged when the predictions don't match their results. They fail to put in correct case capacity and fail to adjust the burn rate factor and temperature after the first tests - and yes this has to be done with a chronograph.
Also, almost everybody ignores the graph window because they don't understand what they are looking at. This is THE most important tool of QL IMO. This graph will tell you from the very beginning if the powder you chose is the correct fit for the bullet / cartridge combo. Most guys give up on a bullet when in reality it was the powder choice that affected the results.
I used to use a Oehler 43PBL that measures pressure and velocity but after learning the correct way to use QL I now only use my Oehler 35 because once the correct burn rate factor is adjusted the velocity and pressure almost always mirror QL predictions.
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