God told man to design the 10mm to Norma levels.
When you mess with God's plan for the 10mm, guns can go Kaboom. Pushing the limit, combined with sloppy or diminishing quality control leads to bad things happening. Some of these manufacturers are deceased so I won't name them out of decency. And there have been some issues with .357 ammo loaded by other manufacturers, as has been discussed here in the past. Whether it is poor quality control, or the guy loading the ammo that day not getting a good night's sleep, being sick, arguing with his wife, or whatever, when we push beyond the limits the ammo was designed for there is a small margin for error.
Give me 200 grains at 1200, or 170 at 1300 to 1350. This IS considered full power 10mm ammo. Anything above that is NUCLEAR level, and must have guns designed for it (proper chamber and springs).
That's my take on it.