My impact is tack on @ 50. Level 4, 870fps so I'm out of mark 2.
switch to 25.39. Couple three same hole then poi moves and groups well or @ least reasonably.
Why , actually WTF,. Okay out comes the chrony. 971fps. That ought to explain that,
Cranked down to min and 880baverage . Tack on. Keep saying 880 is the desired fps for my impct and JSB.