I have a new QB 78 for sale it is a rifle i ordered and did a full mod job on the see what the real numbers are for a QB. Shoots 7.9 cpl's at 760 fps and Gamo tomahawk's at 720 fps. I is a gas hog but with a bulk fill it should be OK. The rifle has less then 150 pellet shot, and I never even shot it at a target, "scope is for the pictures". Never shot any light pellets so I can't tell you how fast it is with them.
I modded the stock a little by taking the cut off comb from one of the B26-2's and gluing and screwing it to the stock and moulded it in with plastic body filler. the stock is bed linered along with the barrel "Q" so I call it midnight.
$150.00 shipped CONUS.