EDgun Matador .22 Velocity Unstable
Hello, this is Marco. I got a little bit of problem, so if anybody have an idea, please help me.
I got a friend who told me velocity is unstable and the extreme spread is approx 50ft/s.
HTSA was adjusted at a gun shop in Japan, but the owner told me that the velocity got very unstable.
Then I checked. The first shot was 1376ft/s. I loosed the HSTA two turnes(-720degrees), got well below 900ft/s and tested.
I attach the shot and figure. It seems to be stable below 900ft/s. Just above 900, it is really bad.
The gun was measured by two different speed measure, and both showed anomalies. One of the meter was used just before, and it showed good value. So, something might be wrong with the Matador.
What bothers me is the value of 1376ft/s, which I think it should not happen physically by air rifle as it is above the speed of sound.
Note:
Velocity measurement tool: Combro CB-625
– Just before this, other gun was measured by this specific meter, and it showed 960-940ft/s. It was normal and stable.
– I checked the regulator, and adjusted to exactly 130bar. I have done shot simulation vent, but it showed exactly 130bar.
– The gun is Matador, 0.22cal, long, new.
Shot from top to the bottom.
Appreciate any help!
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Yes, funny. I don’t trust to the frame chronographs. prefer the barrel ones.
Hello, Eduard.
Thank you for your comment. You were right. It was mis-measuring.
I used two speed meter, and as both showed irregular values, I thought at least something is wrong with the gun. I used the third meter and it showed good value! Stable!
Last time I used the second meter, the one which got the “old data” this time, there was no problem. This time, under 900ft/s was OK as it shows same value to the new one. But above 900ft/s it showed irregular values. Very tricky!
Marco.
It seems to me there is a kind of mismeasuring. As 1 300 f/sec that is over sound speed of the pellet (more then 400 m/sec, that is completely impossible for the PCP guns, using air as working gas).
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I do agree with Ed…i have/had problems from the first time I used frame chronograph … i used two different types. ..i had very funny velocity results. ..so..finally i decided to buy the best chronograph i can say almost the most expensive one “Magneto V3” i paid $400 i hopefully solve this problem and get the real and correct velocity. ..the Magneto V3 is suitable for airguns as well. …
I found so many strange and funny things with my frame chronographs while testing. …i hope i solved my issue with my new Magneto V3…amin