When you are playing power breaks in straight pool,use enough power and english to clear the rack area and put your cueball in an position that allows you to confront the layout from a completely offensive viewpoint. In 14.1,there is always a safety shot,regardless of the layout,therefore,focus on the attempt to clear pathways(Rails),create safety valves,and determine the upcoming break ball as soon as possible. If I encourage the practice of power breaking to soft position breaking,i.e. behind the rack,chipping away(chiseling),the ratio would be 60%-70% power,to 30%-40% softer.
The majority of shots in a straight pool match are softer position shots,so you are more in tune with the feel of the table and ball movement,therefore "Practice that which is seldom used more often to be more confident when you really need it." cajunfats