Had to revive the thread,
I recently bought a scorpion .25 sub 12 off another member (what a super rifle ) & having tweaked it back up from the high 9's to 11.6-11.7 had a quick zero session this afternoon between showers.
While it doesn't seem at all pellet fussy, except Bisley Pest Control which it doesn't seem to like, it shot the JSB lead free single hole at 571fps although at 11.98ftlb a touch too close