Have not made the heavy switch! but yesterday my Glock 20 did this at 10 yards with 180gold dots and 9.1grains of longshot
Five off a rear rifle bag.

[Linked Image]

I would guess the 1200’ish FPS.

Top group= g20 . Bottom was the kid with the 22lr.

Last edited by fredIII; 02/04/19.