All of my PCP

[Stefan]

I was wondering, can all of my topics listed below be merged into this thread?
http://www.gatewaytoairguns.org/GTA/index.php?topic=43644.msg408118#msg408118
http://www.gatewaytoairguns.org/GTA/index.php?topic=39698.msg370548#msg370548
http://www.gatewaytoairguns.org/GTA/index.php?topic=38292.msg356569#msg356569
http://www.gatewaytoairguns.org/GTA/index.php?topic=21672.msg194254#msg194254
http://www.gatewaytoairguns.org/GTA/index.php?topic=19378.msg169832#msg169832

in a next few months I will do a lot of chrony testing, group shooting and slow motion videos capturing - for all of my pcp's. all of them are now regulated. mrod didnt had a chance to stretch his leags with reg, it will be done in next few days.

today I was working on my AA S410 FAC - it used to be sub 12 ftlbs, but I have changed all of the non fac parts in it, and made it full FAC

before installing the regulator, I had a strings like this with JSB 18,13gn pellets, starting at 190 bar

1. 864
2. 871,1
3. 866,9
4. 867
5. 871,6
6. 883,5
7. 890,5
8. 886,7
9. 893,8
10. 897
              170 bar
11. 891,3
12. 896,6
13. 896
14. 900,5
15. 903,6
16. 905,8
17. 902,6
18. 902,3
19. 900,3
20. 895,8
                145 bar
21. 898,9
22. 888,6
23. 892,2
24. 880,4
25. 875,9
26. 872,4
27. 868,6
28. 861,3
29. 857,7
30. 851,2
120 bar


after it It came in, I installed it, set it on 125 bar. starting pressure 190 bar. jsb 18,13 gn

869,6
919,8
860,9
err
846,7
843,3
841,5
837,1
838,0
837,3
843,1
no reading
843,5
err
832,9
836,0
no reading
833,2
no reading
no reading
err
829,4
829,2
848,7
846,4
838,5
832,3
822,1
824,2
803,8 - 100 bar

did a second 20 shot string

same setting

err
884,8
847,6
836,3
831,9
830,3
830,3
828,8
828,7
829,7
830,0
no reading
831,2
830,4
err
831,3
827,5
846,1
840,0

and today, after setting it to 100 bar regulated pressure, with jsb 15,9 gn, start at aprox. 200 bar

928,1
897,7
889,5
872,4
864,8
860,1
853,7
842,5
835,1
err
/
880
854,8
err
-
err
845,4
838
871,5
837,5
843,2
838,2
845,6
861,1
851,4
843,5
840,3
831,7
821,3
err
100 bar

same setting, start at 190 bar

906,6
62,8
882,9
853,7
846,4
843,7
844,2
842,7
841,1
827,5
844,4
847,4
848,9
851,6
850,9
848,1
845,4
err
err
854,4
845,3
840,6
843,2
err
err
-
872,2
err
err
err

100 bar

should I change the reg setting and at what pressure?
 

[rsterne]

Looks to me like you are shooting too close to the Chrony with all those high readings.... You lost roughly 20 fps with the 18 gr. pellets at 125 bar.... That would be expected, because of the smaller volume available for the valve to draw from downstream of the regulator.... If your shot count is too small, you likely have too much hammer strike for the regulated pressure, and if you didn't change that when you installed the regulator, that is almost certainly the case....

What are you trying to accomplish?....

Bob

[Stefan]

30 consistant shots at 900-950 fps with these heavier JSB pellets.
I just opened AA up again, replaced orings, set pressure to 125 bar, and got aprox 900 fps readings for 10 shots with 15,9gn pellets. Its getting dark so no more testing could be done. Hammer preload cant be changed (different spring ok, or different hammer, these ones are FAC stock).

[Stefan]

AA410, reg is set at 125 bar, 190 bar start pressure, pellets 15.8gn JSB
Speeds are:
1.903.4
2.897.7
3.Err
4.888.9
5.891.5
6.Err
7.886.6
8.889.0
9.895.3
10.888.3

150 bar

11.887.4
12.-
13.884.2
14.892.1
15.-
16.886.5
17.894.4
18.898.4
19.891.3
20.882.0

110 bar

21.872.5
22.862.8
23.856.0
24.843.1
25.839.3
26.Err
27.Err

[Stefan]

disregard the first shot, it might be a bad reading. the rest are pretty close. my hw with factory reg has a spread within 15 fps, so i think this one is working properly. but obviously I should put reg pressure down to 100 or 105. 125 is too high. gonna do it tomorrow