Double ActionThis superb new reference book describes the most popular of these revolvers Colt, Smith & Wesson, Sturm Ruger, Taurus and others in words and superb, high quality photographs, documenting their design, technology, and how they shoot. It also describes what they can achieve in precision shooting and discusses trigger pull weight and groups. Double action revolvers in which the trigger cocks and drops the hammer are more popular and much favored by