Here's 3 I could find, but there at least 4 more.
They come from my 400 Triples.. and all 3 were shot from a 55 lbs Merlin XT and hit at say 260 ft/s.
Without the pin nocks these arrows would have been RH's or ruined but not one of them was damaged in any way.
Can't imagine why it doesn't work that way for timujin.. but they work for me.
Opa