That's smokin' bro.
I have pushed them to 1750 fps in my G20/6' barrel with a max load of Power pistol.
Maybe I need to try 800X with them.

1900 fps is 1080 ft/# of ME. Clearly in 41 mag territory as far as energy is concerned.
I used the Sierra's. Don't know which is tougher.
The 135's are meant for close in encounters in crowed shopping mall situations, for apartment dwellers with thin walls, etc.
They basically turn into a "Glaser" type fragmenting projectile at speeds over 1600 fps.