This assumes draw length minus brace height = power stroke which is not correct. Brace height is the distance from the string to the deepest part of the handle. Draw length, that is traditional draw length, is the distance from the string at full draw to the front of the riser which is accepted to be a point 1 3/4" from the deepest part of the handle. Therefore the power stroke for the example used is 30-1.75-6=22.25 not 24.