Any US importers carrying this gun?

[Hawkeye51]

Rod

I really like your stock, how did you strip it down. Did you sand through the finish, or use a chemical stripper?  Was the Poly straight, or a blend of alcohol & olive oil mix?

Thanks

[Back_Roads]

Does anyone know if the "05-2018" to the right of the "(300 Bar) is the manufacturing date

My first one is dated 12- 2017 

[kzz1kaw]

Does anyone know if the "05-2018" to the right of the "(300 Bar) is the manufacturing date

My first one is dated 12- 2017 

If I had to guess I’d say you are right

[superchikn]

Well I finally got a Full blown chronograph, it is a Caldwell.  The little $28 Chinese one is great for real time measurements but is no substitute for  a full featured unit.
My first attempt at a shot string Friday night was 60 shots and I never pressed start on the app.
This is my next one.  It is my 22 Liberty with JSB 18.13s.  I am trying to tune for Baracudas but I had many more JSBs on hand so that is what I shot for this string.  Ports are opened to almost .180, reg wheel is about 1/2 turn CCW and I have adjustable HST ala Stephen The Banker design, tuned to maybe just below the knee.
The pressure drops about 350 psi for every 10 shots.  Started about 4200 psi,  3,800 - 2,700 seems to bee the sweet spot.  There were 3-4 error shots which I removed so the shot count versus pressure level is not accurate.
BTW put a half dozen 'Cudas over it yesterday below 3,800 psi and they were right around 890 fps.
As this is my first PCP and my first real shot string, I would welcome anyones comments.
Thanks

Set: 1       
 Created: 03/30/19 12:30 PM
 Description: Liberty JSB 18.13
 Notes 1:
 Notes 2:
 Distance to Chrono(FT): 3.00
 Ballistic Coefficient: 1.000
 Bullet Weight(gr): 18.13
 Temp: 0 °F
 BP: 0.00 inHg
 Altitude: 0.00
 #          FPS  FT-LBS      PF
 52    894      32.18    16.21 
 51    900      32.61    16.32 
 50    907      33.12    16.44 
 49    915      33.71    16.59 
 48    914      33.64    16.57 
 47    915      33.71    16.59 
 46    924      34.38    16.75 
 45    929      34.75    16.84 
 44    933      35.05    16.92 
 43    939      35.50    17.02 
 42    932      34.97    16.90 
 41    934      35.12    16.93 
 40    936      35.27    16.97 
 39    946      36.03    17.15 
 38    945      35.96    17.13 
 37    957      36.88    17.35 
 36    954      36.64    17.30 
 35    952      36.49    17.26 
 34    965      37.49    17.50 
 33    965      37.49    17.50 
 32    960      37.11    17.40 
 31    958      36.95    17.37 
 30    964      37.42    17.48 
 29    957      36.88    17.35 
 28    971      37.96    17.60 
 27    961      37.18    17.42 
 26    969      37.81    17.57 
 25    969      37.81    17.57 
 24    962      37.26    17.44 
 23    977      38.43    17.71 
 22    968      37.73    17.55 
 21    977      38.43    17.71 
 20    967      37.65    17.53 
 19    963      37.34    17.46 
 18    967      37.65    17.53 
 17    963      37.34    17.46 
 16    964      37.42    17.48 
 15    960      37.11    17.40 
 14    970      37.88    17.59 
 13    962      37.26    17.44 
 12    963      37.34    17.46 
 11    965      37.49    17.50 
 10    947      36.11    17.17 
 9    947      36.11    17.17 
 8    950      36.34    17.22 
 7    941      35.65    17.06 
 6    939      35.50    17.02 
 5    938      35.43    17.01 
 4    933      35.05    16.92 
 3    941      35.65    17.06 
 2    924      34.38    16.75 
 1    914      33.64    16.57 
 Average: 947.4 FPS
 SD: 20.9 FPS
 Min: 894 FPS
 Max: 977 FPS
 Spread: 83 FPS
 Shot/sec: 0.1
 True MV: 948 FPS
 Group Size (in): 0.00

[RDB]

Rod

I really like your stock, how did you strip it down. Did you sand through the finish, or use a chemical stripper?  Was the Poly straight, or a blend of alcohol & olive oil mix?

Thanks

Mike, just regular chemical stripper with a little sanding and wire brushing to remove the old finish. It took a couple of coats to get it all off.  I used Minwax poly mixed 50/50 with mineral spirits. But you can use the wipe on poly which is basically tha same thing. Takes more coats but dries much faster than straight poly.

[RDB]

Well I finally got a Full blown chronograph, it is a Caldwell.  The little $28 Chinese one is great for real time measurements but is no substitute for  a full featured unit.
My first attempt at a shot string Friday night was 60 shots and I never pressed start on the app.
This is my next one.  It is my 22 Liberty with JSB 18.13s.  I am trying to tune for Baracudas but I had many more JSBs on hand so that is what I shot for this string.  Ports are opened to almost .180, reg wheel is about 1/2 turn CCW and I have adjustable HST ala Stephen The Banker design, tuned to maybe just below the knee.
The pressure drops about 350 psi for every 10 shots.  Started about 4200 psi,  3,800 - 2,700 seems to bee the sweet spot.  There were 3-4 error shots which I removed so the shot count versus pressure level is not accurate.
BTW put a half dozen 'Cudas over it yesterday below 3,800 psi and they were right around 890 fps.
As this is my first PCP and my first real shot string, I would welcome anyones comments.
Thanks

Set: 1       
 Created: 03/30/19 12:30 PM
 Description: Liberty JSB 18.13
 Notes 1:
 Notes 2:
 Distance to Chrono(FT): 3.00
 Ballistic Coefficient: 1.000
 Bullet Weight(gr): 18.13
 Temp: 0 °F
 BP: 0.00 inHg
 Altitude: 0.00
 #          FPS  FT-LBS      PF
 52    894      32.18    16.21 
 51    900      32.61    16.32 
 50    907      33.12    16.44 
 49    915      33.71    16.59 
 48    914      33.64    16.57 
 47    915      33.71    16.59 
 46    924      34.38    16.75 
 45    929      34.75    16.84 
 44    933      35.05    16.92 
 43    939      35.50    17.02 
 42    932      34.97    16.90 
 41    934      35.12    16.93 
 40    936      35.27    16.97 
 39    946      36.03    17.15 
 38    945      35.96    17.13 
 37    957      36.88    17.35 
 36    954      36.64    17.30 
 35    952      36.49    17.26 
 34    965      37.49    17.50 
 33    965      37.49    17.50 
 32    960      37.11    17.40 
 31    958      36.95    17.37 
 30    964      37.42    17.48 
 29    957      36.88    17.35 
 28    971      37.96    17.60 
 27    961      37.18    17.42 
 26    969      37.81    17.57 
 25    969      37.81    17.57 
 24    962      37.26    17.44 
 23    977      38.43    17.71 
 22    968      37.73    17.55 
 21    977      38.43    17.71 
 20    967      37.65    17.53 
 19    963      37.34    17.46 
 18    967      37.65    17.53 
 17    963      37.34    17.46 
 16    964      37.42    17.48 
 15    960      37.11    17.40 
 14    970      37.88    17.59 
 13    962      37.26    17.44 
 12    963      37.34    17.46 
 11    965      37.49    17.50 
 10    947      36.11    17.17 
 9    947      36.11    17.17 
 8    950      36.34    17.22 
 7    941      35.65    17.06 
 6    939      35.50    17.02 
 5    938      35.43    17.01 
 4    933      35.05    16.92 
 3    941      35.65    17.06 
 2    924      34.38    16.75 
 1    914      33.64    16.57 
 Average: 947.4 FPS
 SD: 20.9 FPS
 Min: 894 FPS
 Max: 977 FPS
 Spread: 83 FPS
 Shot/sec: 0.1
 True MV: 948 FPS
 Group Size (in): 0.00

Ray, the regs in these like to creep. And judging by your first 10 shots its well below the knee. Or it could be the reg not working good at that high of fill pressure. If you could run a 20 shot string from 3500 psi and post what you get it would help determine whats going on. Fill to 3500, dry fire it once and let the gun sit for a hour or two and then run the string and post back.

[superchikn]

Rod,
Here is the same string in the sweet spot with first 10 and the off reg shots removed, this was done within the app so calcs are good.

Created: 03/30/19 12:30 PM
 Description: Liberty JSB 18.13
 Notes 1:
 Notes 2:
 Distance to Chrono(FT): 3.00
 Ballistic Coefficient: 1.000
 Bullet Weight(gr): 18.13
 Temp: 0 °F
 BP: 0.00 inHg
 Altitude: 0.00
 #          FPS  FT-LBS      PF
 28    957      36.88    17.35 
 27    954      36.64    17.30 
 26    952      36.49    17.26 
 25    965      37.49    17.50 
 24    965      37.49    17.50 
 23    960      37.11    17.40 
 22    958      36.95    17.37 
 21    964      37.42    17.48 
 20    957      36.88    17.35 
 19    971      37.96    17.60 
 18    961      37.18    17.42 
 17    969      37.81    17.57 
 16    969      37.81    17.57 
 15    962      37.26    17.44 
 14    977      38.43    17.71 
 13    968      37.73    17.55 
 12    977      38.43    17.71 
 11    967      37.65    17.53 
 10    963      37.34    17.46 
 9    967      37.65    17.53 
 8    963      37.34    17.46 
 7    964      37.42    17.48 
 6    960      37.11    17.40 
 5    970      37.88    17.59 
 4    962      37.26    17.44 
 3    963      37.34    17.46 
 2    965      37.49    17.50 
 1    950      36.34    17.22 
 Average: 963.6 FPS
 SD: 6.5 FPS
 Min: 950 FPS
 Max: 977 FPS
 Spread: 27 FPS
 Shot/sec: 0.0
 True MV: 964 FPS
 Group Size (in): 0.00

[RDB]

We need to determine if its the reg not liking the fill pressure or your tuned too far below the knee. If you could run a string from 3500 after letting the gun sit for a while it would help.

[darkcharisma]

We need to determine if its the reg not liking the fill pressure or your tuned too far below the knee. If you could run a string from 3500 after letting the gun sit for a while it would help.

on my liberty it didnt let 3500psi. at 3500psi i had to dump 10 shots before it gets consistant. ymmv

[USAFANG6799]

on my liberty it didnt let 3500psi. at 3500psi i had to dump 10 shots before it gets consistant. ymmv

U 2 I C.
Wondering how many others Liberty are doing the same thing but haven't said anything or just thinking that before they cry wolf they'll wait to see if the reg will settle in.

[Orion]

on my liberty it didnt let 3500psi. at 3500psi i had to dump 10 shots before it gets consistant. ymmv

U 2 I C.
Wondering how many others Liberty are doing the same thing but haven't said anything or just thinking that before they cry wolf they'll wait to see if the reg will settle in.

In my video of the shot string I didn't see that. My gun was not modified at all at the time of the recording, I was really impressed with the consistency for 80 shots. In that video I was using CPHP 14gr

[RDB]

If the strings are starting out low and climbing, too much reg pressure or not enough hammer strike. If the first few shots are higher, a bit too much hammer strike for the reg setting. Ideally we wouldn't have to deal with this if the regs were better. But you can adjust the hammer strike to compensate for the creep. I have mine set up so that only the first shot is 10 fps faster than the rest. I can live with that. I only fill to 250 bar.

[USAFANG6799]

In my video of the shot string I didn't see that. My gun was not modified at all at the time of the recording, I was really impressed with the consistency for 80 shots. In that video I was using CPHP 14gr

Many thanks for sharing how your Liberty is performing when it's new, your fills and with what pellet your using.
It's always interesting to compare.

I only fill to 250 bar.

Many thanks for sharing what fill your using. Interesting that your using a fill of only 250 bar.
I'll have to see what kind of results I get with that fill.

[dpittman]

It just looks like a long bell curve really. I've never filled past about 3600 so I don't know.

[dpittman]

I do think they creep some. If mine sits for awhile the first shot will be 940-950 then settle down to around 925. Should be broke in by now I would think.

[dpittman]

I think with Billys plenum with a gauge on it we will know If they creep.

[RDB]

I do think they creep some. If mine sits for awhile the first shot will be 940-950 then settle down to around 925. Should be broke in by now I would think.

If you up the reg a 1/16 of a turn or back the hammer off a smidge it will flatten out.

[USAFANG6799]

If you up the reg a 1/16 of a turn or back the hammer off a smidge it will flatten out.

Does the fill pressure along with the 1/16 turn or back the hammer off effect how much it flattens out ?
Unless I'm mistaken the regulator is sensitive to different fill pressures.

[kzz1kaw]

Food for thought🤔 what about the Bellville washers in the regulator? Could it be that the washers are of low grade? I’m going to take mine apart before and after chrony results order new Belleville washers from McMaster.

[RDB]

If you up the reg a 1/16 of a turn or back the hammer off a smidge it will flatten out.

Does the fill pressure along with the 1/16 turn or back the hammer off effect how much it flattens out ?
Unless I'm mistaken the regulator is sensitive to different fill pressures.

That was directed at the posters state of tune. It all depends on one's settings. But he's very close with his settings and whatever he is filling to. Every gun is different. And again, without dealing with this particular regs shortcomings, we'd be able to fill to whatever pressure we wanted to and not worry about the reg doing what its supposed to do. Its up to the end user to tune around the creep and decided whats acceptable to them.

These guys can explain far better whats going on than i ever could.... Point being, you shouldn't have to waste ten shots to get a good ES.

https://www.gatewaytoairguns.org/GTA/index.php?topic=137610.0


https://www.gatewaytoairguns.org/GTA/index.php?topic=74919.100