OK, Well having been rumbled straight off that all is not well , across the chrono the average by magazine.
1 = 9.22 ftlb, 2 = 9.70 ftlb, 3 = 10.05 ftlb, 4 = 10.39 ftlb, 5 = 10.69 ftlb, 6 = 10.91 ftlb, 7 = 11.30 ftlb, 8 = 11.35 ftlb, 9 = 11.50 ftlb, 10 = 11.57 ftlb
outright minimum 8.90 ftlb, outright maximum 11.79ftlb (2.89ftlb spread)
each individual magazine was actually pretty consistent, every one the velocity spread was single figure fps, 9fps to 3fps across the 8 shots
Fill pressure - start 230bar, after mag 5 180bar, end 125bar.
Oh & just to make it really interesting 7 mags were FTT 20gn, 3 mags at random were JSB 25.4gn
It just didn't fit your style, it was too shabby, something was up, and now you can "zero" in on it and get it sorted as I'm sure you will end up with one hole groups once the issues are identified. It could be a combo of poor pellets or a fault with the gun somewhere - a probe seal would be the grail fault
Making a mockery of growing old gracefully since I retired