https://www.kiesler.com/product/det...wman-non-toxic-rht-40-sw-125-grain-frangible/
The CF stamped primers indicate non toxic primers.
Factory frangible ammo, and not dangerous. They typically run hot as this makes them cleaner.
More recoil as the bullet has more kinetic energy.
So in your more retail-knowledgeable opinion, is $300 for 1000 of those a "fell off a truck" price? I have no clue.