My Crown MK2 was originally set up as a .22 cal and shot well. I decided to convert it to .177 with a 600mm barrel. I de-tuned it by reducting the reg pressure from 155 to just under 100 because I wanted to shoot JSB 13.4 gr pellets at 20 fpe or 815 fps. I had the T/P set at .177/.22 and the hammer spring on Max. Ok, it was within my goal. For the heck of it, I started reducing the HS a step at a time till I got to No. 2. Guess what? The velocity INCREASED. Am I missing something?