My New Vulcan .25 Shot String
Shot a string of JSB Kings over the chronograph. It seems to consume lots of air and the velocity has a downward trend. Have shot 200 pellets so far. Shoots thick skirt AirArms better than thin skirt JSB Kings
So what do you guys think, any suggestions.
Start
230 bars
912
911
910
906
907
905
909
909
905
200 bars
906
901
903
899
901
902
896
897
898
180 bars
905
904
902
899
901
896
897
898
898
150bars
JSB King Heavy
240 bars
821
823
817
821
818
823
818
816
815
210 bars
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I have reg testers for Edgun and Vulcan … i will test it ..no way
i have tried my friend’s Vulcan few days ago, it was really surprised me with the weird ES, the velocity dropped down from 909 FPS to 865 FPS then up then down,,, i will post the string here,,,i really want to fix it and find out the issue,,,
something is wrong with the regulator i guess
i was guessing the same,,, but i said,,lets not to touch the reg at the first time,,,and try all possibility before touching the reg,,, if no use,,then i suppose to disassemble the gun ,,,
If you have a regulator tester for Vulcan then check the regulator set pressure and consistency.
i have tried my friend’s Vulcan few days ago, it was really surprised me with the weird ES, the velocity dropped down from 909 FPS to 865 FPS then up then down,,, i will post the string here,,,i really want to fix it and find out the issue,,,
something is wrong with the regulator i guess
i was guessing the same,,, but i said,,lets not to touch the reg at the first time,,,and try all possibility before touching the reg,,, if no use,,then i suppose to disassemble the gun ,,,
i have tried my friend’s Vulcan few days ago, it was really surprised me with the weird ES, the velocity dropped down from 909 FPS to 865 FPS then up then down,,, i will post the string here,,,i really want to fix it and find out the issue,,,
something is wrong with the regulator i guess
Guys,,,
i have tried my friend’s Vulcan few days ago, it was really surprised me with the weird ES, the velocity dropped down from 909 FPS to 865 FPS then up then down,,, i will post the string here,,,i really want to fix it and find out the issue,,,
jsb variation in weight can be up to 5%, typically it is better but that was the factory spec.
do you weight you pellets before chrony testing?
having said that, when my gun was new had MANY replica readings, but I never run it at full power.
Take gun out to 80 yards. It shows
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Yes there are some larger variations in the string but the poi didn’t change and it kept shooting 1/2″ and lesser groups at 50 yards.
I’m only talking about sending regulator. Everything else works great. I just believe the regulator needs some work
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eelect: A lot of people would argue that a 1500 and up gun shouldn’t need to goto ernest that is why there are some many impact haters. Obviously you and I don’t feel that way.
I think this is typical of Vulcan regulator. I’m planning on sending mine to Ernest for a going over. I get 6 great shots out of my mag . 3 of those shots are out to lunch at 80 yards. I figured after 10k rounds the regulator would smooth out but there should be no sudden 8 fps drops in the shot string
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Went out today and took few shots over the chronograph.
Starting pressure 250 bars
913
916
916
913
914
915
911
913
914 – 225 bars
917
908
909
911
907
909
912
912
910 – 200 bars
914
908
905
909
915
908
908
905
906 – 175 bars
Shot less than 1/2″ groups at 50 yards. Its performance seems to be improving session by session.
:rofl:
why people mess with their regs?
was too difficult to adjust the HST?
next time you adjust both right.
Took the regulator out and checked it with the tester. It was at 140 bars. Brought it down to 135 bars. Loosened the valve by half a turn. Haven’t touched the hammer spring yet. It was getting dark so shot 2 mags over chronograph. 3 errors due to low light. Consumes less air now.
240 bars
907
907
906
907
905
907
906
911
912
904
909
909
908
905
903
200 bars
Shot the below magazine through an Ed chrony, no errors.
200 bars
910
910
903
903
903
892 (why would this happen?)
906
899
903
175 bars
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Don’t be afraid bro, you cant break anything