Deleted my original reply as things have changed since i chronoed my FWB80 with Geco's and my preferred pellet RWS R10's 4.49.

Geco's were inconsistent on paper and over the chrono so i bought a tin of R10's and my scores with the FWB80,2240 and the gamo compact are upper 80's-lower 90's(UBC 10m FWB80 score 87).

Geco's were only returning upper 70's at best perhaps an 80 here and there.

You won't enjoy your target shooting especially if you take it seriously if your gun/pellet combination is letting you down.