I have an M3 with a 700mm barrel in .22cal which I am trying to tune to shoot 27gr slugs at or around 950fps.I have installed a Huma pin probe huma light hammer and the power spring set.Set up is macro wheel at 16 micro at or near 5 reg 1st 135 2nd 110 valve at line 5.My question is it is shooting at around 940fps on power wheel 16 but shoots the same speed on power wheel 1. I would expect to see a significant drop in power between the two settings. what am I doing wrong ?