I was taught by my Father and Uncles to hunt with hammer guns exactly as described,hammers back,breech open.When gun was mounted,with weak hand on forearm,breech snapped shut,all was one fluid motion.Never saw a mechanical misfire but several prefires with gun discharge prior to touching the shoulder.I do agree,(better safe than sorry)especially when hunters todayjust do not have years of experience with the hammer guns.
Bill