Betcha your extreme spreads with those Win and Fed-primed loads are well above 60 fps, maybe even around 100 fps.
Tighten up your hammer spring properly and see what happens. Your CCIs will also go 100% then.
I sure hope your "tuned" gun isn't ever called upon for self-defense.
Let us never forget that the only legitimate source of government power is the citizens. If WE cannot exercise a certain power, we cannot grant it to the state.