Back on Youtube full time flexin:

YOOOO what the.. at the end of the 2nd video the Sellier & Bellot ad has the full cartridges flying around and some appear to be “firing” and breaking the sound barrier.  Sure it’s kind of an artsy video, so it’s probably just supposed to be cool looking and not actually representative of what happens when you fire a round.  S&B knows this right? *nervous laughter* RIGHT? 😂