The trigger is 2-stage. According to HK the slack can and should be taken out as soon as the pistol points toward the target. You end up with one (1) trigger as there's no "finger memory" of taking out the first stage. If you're releasing to reset you're pulling just the second stage every time. A difference in a pound is measurable but not detectable. The difference between 9+ pounds and 5 pounds is both.
Stick with DA/SA!
DA/SA is a needless complication. DA/SA with a safety is even more of a complication.