I agree that smoothness, a clean and recognizable break and exact reproducibility are key aspects to trigger characteristics with shooting. The break doesn't have to be too low, even 4 pounds is fine, because of the extra weight of the Krag. It handles well and the recoil is easy to handle for resetting for the next shot.  I use a shooting grease on my Krag triggers after stoning them for smoothness. Holds and lasts better than most oils.