I have a friend that shoots hogs with this load out of a AR 9mm carbine with 8" barrel - and he report is that these rounds work very well. He likes the +P because it extends the range at which he can reliably put the critters down. Also - this same Fed HST 124 grain +P load is 1200 fps out of my G17 - so the Scorpion is only 200 fps faster - not 400 fps. Your point is well taken though, by pushing a bullet faster than it is designed (or slower) can cause weird things to happen, like either too fast or too much expansion (too little penetration) or little or no expansion (small wound channel).
cheers
tire iron