.25 shot string !!!!! extreme spread of 140 fps???? help….
got my pro chrono today. first i tried adjusting it and realizing that it would not stay in the range i wanted. first it was at 970 then i backed it out like 3 turns and it was at 1033 and i was very confused so i backed it out to flush and it was around 940, at this point it just kept jumping all over the place even with the slightes movement of the hammer spring screw. i got it to around 900 after about 7 mags then i cleaned my barrel and lubed my pellets with mac1. and started this shot string at 148 bar.
899- 148 bar
913
913
927
918
932
924
932
944
936- 130 bar # 10
944
944
940
941
938
950
954
953
947
943
944- 110 bar #21
then i refilled to 168 bar ( my tank was low)
844- 168 bar
845
863
861
867
894
904
920
911
908
err
err
902
909- 150 bar #35
914
908
906
907
912
914- 138 bar #41
921
941
952
981
984- 130 bar #46
980
978
err
979
984- 120 bar #51
978
971
978
971- 110 bar #55
964
961
955
952-104 bar #59
HI 984
LOW 844
AVE 931
ES 140
SD 34
IS THIS NOT A CRAZY SHOT STRING?????????? i dont think my regulator is working very well? please help i must say that i have just barely over 700 shots through the gun does it just need more shots to breeak in?
seriously i am getting more and more dissapointed with kalibrgun the more i test it and shoot it 😕
All Replies
so heres my findings
so i guess this was the issue!
took some 7 micron polishing compound and used it on every single washer spring in the regulator by rubbing two together on both sides and reinstalling those two together.
it took just under a half turn to get it right lol
when pulling the internals out of the reg. i noticed that the mating surface that hits the delrin block, looked like it had some very tiny imperfections so i polished it with this q-tip and some polishing compound. i for got to take a pic of it so heres the q-tip.
my tank only had enough to fill me back up to 115 bar go figure!!!! :sadn:
Try using this method
Also provided by Ernest
i did not even look at that!!! thank you! MORE TESTING TO COME. i set my reg using ernests 1/16 pin trick.
Looks like your reg is set at 150 bar or higher.
I would tryin lowering the regulator pressure.
fill it up to 200 bar and shoot it . it should stay somewhat flat down to 150 bar. then get a little wild. if so… lower the regulator pressure.
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Did some more adjustments and I am pretty happy! I will need to bring it up a little but at least it is consistent now.
910 – 185 bar
903
903
911
910
903
900
897
897
894
883
892 -163 bar
894
893
897
902
905
898
902
907
908
900
897
890
893 -142 bar
893
887
878
877
876
874
879
874
870
empty shot
859
865
869 – 122 bar
868
869
877
873
876
881
880
887
889
895
900
906 – 104 bar
910
905
907
908
908
905
904
899
885
874
864
872 – 82 bar
hi 911
low 859
avg 890
es 52
sd 14
60 recorded shots from 185 to 82 bar