Originally Posted by FSMike
I think if you took a bunch of those loads and interspersed them with buckshot and loaded them in a Street Sweeper you could convince most pirates to change occupations.
No, they would just shake their heads in disbelief as you attempt stop the magnesium in the round from burning its way through your skin.
Those rounds are not meant to be shot by an autoloader. If you are lucky, the backpressure won't be sufficient to cycle the mechanism. If you are unlucky, then the round will be ejected. But since they burn for up to 2 seconds the incendiary shell will still be burning when ejected and will most certainly do the shooter damage.
We tested these types of rounds years ago and despite being a great party gag I wouldn't dream of using it aboard a ship. One couldn't use it in an enclosed or partially enclosed space and thus one would turn a powerful firearm into an expensive metal club.