OK I've got some numbers , but I don't know how to put them in a vertical list. So my list will have to be horizontal . Started with 2 fresh carts. temps low 80's . first 10 shots with JSB exacts ,I think 8.4 g.... 694, 710, 722, 735, 752, 755, 757, 755,758, 758 then I switched to RWS superdomes 8.3g.....760, 762, 762, 761, 765, 774, 771, 774, 776, 774, then I switched to CPH's, looks like 10.5 g...743, 740, 733, 731, 728, 724,721, 717, 714, 716, then I switched to Gamo tomohawks .?...g....785,783, 773, 769, 759, 766, 754, 751, 746, 726. and then I suspected I was getting low on CO2 so I switched back to the CPH's for 5 more shots ...648,642,635,623,616,......The CPH's grouped the best at 10 meters with except for 2, I pulled had a ragged hole , the tomohawks were the worst at over an inch . I'm going to sight it in with the CPH's and shoot some groups at 20 and 30 yards . Looks like the gas started to run out around 40 shots. I'll check the numbers with the CPH's on the first 10 after a couple of settling shots. Will let you know what happens. kirby