EDIT - Skip down to my 2nd post to see test #2 which came out better (still a work-in-progress)
Temperature = 43f
Starting Pressure = 212 BAR (all I had in my tank)
Ending Pressure = 100 BAR
(Pressures measured by stock FX guage)
Pellet = JSB 18.1
Hammer spring = 3 turns out
EDIT - Reg pressure = 110 bar (I misunderstood what line marked the real pressure setting)
Full string results (13 magazines / 156 pellets)
H = 792
L = 719
A = 772
ES = 73
SD = 12.5
Average FPE = 24
(Yes this velocity is low. I will adjust upwards for next session. I'm pretty sure I'll start with increasing the reg pressure.)
ProChrono Data from the 1st 99 shots (max shots the chrono's memory can hold)
H = 792
L = 762
A = 777
ES = 30
SD = 6
Installing the reg was easy. I have had the original regulator out a number of times to adjust. Installing this Huma was no different. Here's the HUMA next to the FX regulator. I was surprised at the size difference.
Here is a link to my Google Sheets with this data and charts.
And here is the line graph of the full 156 shots:
And when I omit the last two mags and "only" include 11 mags it looks a bit better:
Conventional wisdom is that the regulator consistency will improve as the rifle is shot more.
Oh, here are pix from the starting pressure at the gun and JoeB tank.
By the time I got my stuff setup outside (cold temps) the rifle pressure registered about 212 BAR.
And ending pressure at the gun:
Targets and chrony data. Targets were at 50 yards on a relatively blustery day:
Temperature = 43f
Starting Pressure = 212 BAR (all I had in my tank)
Ending Pressure = 100 BAR
(Pressures measured by stock FX guage)
Pellet = JSB 18.1
Hammer spring = 3 turns out
EDIT - Reg pressure = 110 bar (I misunderstood what line marked the real pressure setting)
Full string results (13 magazines / 156 pellets)
H = 792
L = 719
A = 772
ES = 73
SD = 12.5
Average FPE = 24
(Yes this velocity is low. I will adjust upwards for next session. I'm pretty sure I'll start with increasing the reg pressure.)
ProChrono Data from the 1st 99 shots (max shots the chrono's memory can hold)
H = 792
L = 762
A = 777
ES = 30
SD = 6
Installing the reg was easy. I have had the original regulator out a number of times to adjust. Installing this Huma was no different. Here's the HUMA next to the FX regulator. I was surprised at the size difference.
Here is a link to my Google Sheets with this data and charts.
And here is the line graph of the full 156 shots:
And when I omit the last two mags and "only" include 11 mags it looks a bit better:
Conventional wisdom is that the regulator consistency will improve as the rifle is shot more.
Oh, here are pix from the starting pressure at the gun and JoeB tank.
By the time I got my stuff setup outside (cold temps) the rifle pressure registered about 212 BAR.
And ending pressure at the gun:
Targets and chrony data. Targets were at 50 yards on a relatively blustery day: