I have a Shockwave, and can put it into action pretty quick . Never fired a .460 or a 500 S&W but I think I could put more rounds on target with the pump than with a mega handgun under the circumstances of recognizing the threat and taking action . I like the option of slug , buckshot combination as well .Trust me, when the adrenaline kicks in while your witnessing that Bruin Close on you in slow motion, you won't believe what you can handle! Now about that less than 16 inch barrel on a larger than 50 caliber projectile? Gonna take some splainig Lucy! Put a Cruiser Grip on at least a 16 inch, equip it with express or better iron sights, and store it in an over the shoulder scabbard. Your now properly prepared and need to practice on the filled water heater until it becomes second nature. Just remember that all your gear is going to be confiscated when you drop that Bruin, so you won't need to worry about what to do with it years later when you return. YMMV.