HAH!
You know that's how the Grand Canyon was formed right? Jew dropped a quarter and dug to find it.
Same with copper wire. That was invented by two jews fighting over a penny.
Put sheboon right in her place.
Lots of subsonic rounds out there. 147gr 9mm. most .45 etc.
Usually just need a big heavy bullet is all.
It's not uncommon and I wouldn't consider it "specialty". Recent marketing may make it seem so with increasing popularity in suppressors.