FX Impact Mark II air rifle question

[scope-eye]

My best grouping so far is 3/4 inch at 33 yards with 21gr gamo pellets at aprox 700FPS.
"Distance was measured with my range finder and not a guesstimate"

 

[SteveLM]

I've managed about the same; somewhat over 1/2 inch at 25 yards. FX with Exact 16 gr pellets at about 915FPS.