I shot another ten rounds through the chronograph with the Concept Lite on power setting 4, here's the data set from that session...
Created: 08/06/19 10:54 AM
Description: String 3
Notes 1: power setting 4
Notes 2: JSB Jumbo Exact 15.9
Distance to Chrono(FT): 1.00
Ballistic Coefficient: 1.000
Bullet Weight(gr): 15.89
Temp: 71 °F
BP: 1010.08 inHg
Altitude: 850.00
# FPS FT-LBS PF
10 859 26.04 13.65
9 863 26.28 13.71
8 864 26.34 13.73
7 862 26.22 13.70
6 879 27.27 13.97
5 855 25.80 13.59
4 ERROR 3
3 857 25.92 13.62
2 ERROR 3
1 872 26.83 13.86
Average: 863.9 FPS
SD: 8.0 FPS
Min: 855 FPS
Max: 879 FPS
Spread: 24 FPS
Shot/sec: 0.0
True MV: 864 FPS
Group Size (in): 0.00
Regarding accuracy, I'll let the photo speak for itself, 18.5 yards, ranged on my accurate range finder, all ten rounds one ragged hole, from a bi-pod...
I can only add this, I am a decent shooter, 237 out of 250 on the KDQC with iron sights and an M-16, I can't max the offhand because I am too tall and thin (the wind blows me around)... I have zero experience tuning an air rifle, I came from the PB world... Ok, a lil better than decent... One ragged hole, ten shots...
Ken
EDIT: I looked closer at the target, it might be nine in one ragged hole, I cannot determine if the one at 9 o'clock wide left is a flyer or not...