I don't shoot those powders but for RL-17 RL-22 normaMRP and IMR7828ssc I had to adjust just about the same amount you did...with RL-25 QL was 30FPS slower RL-19 was within a couple of FPS as was IMR4831 and H4831...If I remember right H4350 was 50FPS faster than QL...I think it depends on powders and lots...I know when I start running compressed loads its up around 20+%...if your loading close to the lands you might want to play with your start pressures.
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