HAHAHA!!! U R probably right about placement, my bruise looked like a waffle for a while.I guess Dubar and I are weenies because we get bruised!
Seriously, the placement of your bruise is proof the gun was not shouldered properly. I had a similar situation. My wife asked what happened? Mine looked more like Zebra stripes!
I've shot a Scorpion and would say it has about 40% less recoil than a Sub 2K. Maybe it's because I placed the butt stock correctly? Crazy because my tiny P365 is painless after shooting 300+ rounds.
I did shoot my Romanian M44 Mosin with 2 recoil pads on it...one was a rubber pad made to replace the steel strap that's on the stock and the other was a Limbsaver pad I had laying around that conveniently slipped over the other pad. Didn't feel a thing but a slight thump, it sure sounded like a cannon going off. Everyone that was at the range at the time came over to look at what I was shooting.