A little habit, and you'll be shouldering your gun from a slung postion almost as fast as you would from port arms. The hint is NOT to carry the gun military style. That was developed for long bayonetted rifles and muskets, and doesn't work afield. Carry your gun on your right (for right-handed) shoulder, with barrels parallel to the ground and pointed forward, with your right hand holding the gun, trigger guard under your elbow, and your hand on the foreend. Very safe and you always know which way the barrels look. If a bird flushes, you lift your gun a bit with the right hand, rotate it 90 clockwise, and off the shoulder it goes; than you begin shouldering motion, grabbing the foreend with the left hand and moving the right to the wrist as the gun goes up. That works real quick after you've practiced it. The German way of carryin a gun muzzle up with gun to the front of the shooter on the LEFT shoulder works surprisingly well too.
