Martin Saddlery's 5/8" Barrel Rein with latigo lacing has a lot of details that can help you shave that time. It has good adjustability. We feel that it also has the best non slip grip, due to the latigo laces. They are also thicker than most single reins so you feel like you have something in your hand. Of all our barrel reins, they have the most even weight through out. The ends and center have a consistent feel.