The three LBT bullets lubes, Commercial, Blue and Blue Soft, are interchangable so far as loads, velocity potential etc. Some say Blue soft beats the others, but if so it is minor. Using the same powder charges I believe you'll find pressure, accuracy and cronographed velocities to be equal. When you switch lubes there is no need to clean the lubricator of blue, just add a stick of soft and go. You'll know when it has replaced the blue and is filling the bullets by the easier flow through the lubricator.