After shooting my .177 Red Wolf for awhile, I noticed that after 60ish shots, the pellets were going low. So I shot a string from 206 bar to 158 bar and the shot string was a decreasing velocity slope like a non-regulated PCP. I emailed the dealer with the data and their reply was "did you fill to 250 bar?, answer of course was nope. I only need about 80 good shots for Field Target, so why fill for 200 shots, besides, 250 bar stresses the gun/o-rings more and I would have to fill the CF tank more often to get to 250 all the time. Check the chart below. I watched two videos on U-tube and read the directions from "the other Mark B" and they says when changing the pulse lengths, change all three values the same number, In my case, the mid pressure, 200 psi, pulse length produces the correct velocity , I need to raise the low pressure pulse length, about 168 psi, to get the velocity up to match the med pressure velocity. Anybody change just one value to flatten the curve?
I have the exact same thing with my .177 Redwolf and the same ultimate question, what happens if we change just the one Low Power setting?
I've been playing with fill pressures and I have found that I do get flatter strings starting at 240bar, that doesn't really help FT prep in my case. Is if were to shoot on low on a FT course I'd want it just under 12fpe, well If I start at 240bar I'm over 12fpe for the flat part of the string that I obtained by the higher fill....
Just looking at the shot string and knowing nothing of the programming just a WAG lower the regulated pressure just a bit should do the trick. looks like the first 38 shots are on the regulator and the last are not.
Sorry should have looked at the date of the thread.
Billy if the shot string above was shot on "High" try a shot string on "Medium" or "Low" and see if it flattens out. After looking at AOA's programing video it appears the gun is set too high on the "High" power setting. In the video they say that if the power is programed to high, the gun will act like an unregulated gun.
Good idea. Not only that but the three pressure pulse levels are set at 250,220 and 195 bar, way too close. I’ll try low power, those are set at 250,185 and 145, more reasonable for .177. Thanks Terry, I was worrying about high too much. If mid or low works I’ll just use those numbers on high power and adjust slightly.
MAde a plot of pressure calibration points in the data vs the value for the pressure bits. Why is this important? On my Red Wolf, the lowest pressure is 153 bar, for a .177 it should be about 125 bar. So if I lower the low pressure on the three power levels, what bit value to I use. Just use this data to extrapolate to find the bit value for the new pressure.
MAde a plot of pressure calibration points in the data vs the value for the pressure bits. Why is this important? On my Red Wolf, the lowest pressure is 153 bar, for a .177 it should be about 125 bar. So if I lower the low pressure on the three power levels, what bit value to I use. Just use this data to extrapolate to find the bit value for the new pressure.
To quote PowerSet MK2 Programmer Instructions dated 5 December 2015
"Digital measurement of Bar or Voltage: 1bit = .244 Bar. 1bit = 0.0744 Volts respectively. Note: bits are used in all GCU internal measurements, using whole bits help to make calculations more accurate rather than using Bar or voltage decimal approximations."
