
Thanks Mike, and thanks for letting me use your Chrony for testing, it saved me and taught me a LOT as you can see in my post!
I initially would shoot from 200 to 150 BAR, and then refill because I thought the velocities would start to fall off afterward. Well I found that I can run through four complete magazines before having to refill, actually ten more if I "needed" to. Thats 32 shots with all four magazines at 32ft/lbs. That really made my day seeing those numbers! Less pumping is always better than more! The previous owner thought it was set at 30 ft/lbs, and being skeptical I had to check the numbers for myself. I was pleased with the power count, but even more pleased with the stats of the shot strings.
Velocities with 18.0 gr unsorted JSBs (all numbers are from 32 shot strings...4 magaines):
5 turns out on air restrictor:
Mean: 894.4 fps
Med: 893.9 fps
St. Dev: 5.20 fps !!!
Power: 31.98 ft/lbs
4 turns out:
Mean: 888.48 fps
Median: 890.97 fps
St. Dev: 8.87 fps
Power: 31.56 ft/lbs
3 turns out:
Mean: 867.36 fps
Median: 868.70 fps
St. Dev: 7.04 fps
Power: 30.08 ft/lbs
My main goal in testing was to find the setting needed to achieve 12 ft/lbs for a local clubs indoor Monday night airgun shoot; as well as the 20 ft/lbs for a field target shoot next weeknd. I got REALLY lucky on the 12 ft/lb number. I had to switch to the lightest pellets I had on hand (15.9 gr JSBs). To achieve that number I have the restrictor
1/8 of a turn from the bottom of its travel, really slow at only 578 fps. I'm glad it is indoors!
On the high end of power, I was planning on turning it down for the sake of efficiency but with the surprising numbers on shot count AND power I will keep it at 5 turns out. I need to go back after that anyway and get more pellets!
I think in posting this it was the last straw and I convinced myself I need a chronograph! Thanks again for letting me use you Chrony! I'm anxious to test out the powder burners when I get one now!