Your not asking the right question.
Bottom bouncing can be a productive (a ethical and) fishing method. Can it be applied to slow water sockeye? NO
really the correct term for the sockeye fishery is flossing. Calling flossing bottom bouncing does an injustice to bottom bouncers with short leades, bait, spin n glo's etc AND WHO ARE ATTRACTING A BITE.
Flossing requires current to create a sweep in your presentation. As the weight arks across the river bottom the hook trailing. the more leader between the hook and weight, the more chance a fish will come between the two and catch the line in its mouth. the weight then quickly draws the hook into the corner of the fishes mouth and whammo...fish on.
Slow currents wont allow for that sweeping action, it may not stretch the leader out as much, and the slower speed probably give a fish mre time to react to the line in its face.