Airgun Technologies Problem with Uragan 2

Hi, I have a Uragan 2, 700mm, .22.
When shooting I feel a noise, a loud bang, very loud in my ear, to the point of bothering me. Associated with this, I feel a jet of air coming out of the stock.
I've already checked the position of the barrel in relation to the transfer port, I've changed the oring inside the barrel, I've changed the hammer setting, but the noise is still loud. I don't feel air leaking through the probe. I feel like air is coming from under the hammer.
It has 140 Bar, shooting 29gr slug at 930fps.
What should I do to fix this? Talking to other Uragan 2 owners, no one reported the same problem, even using the same settings.
Thank you for your attention.
 
Hi, I have a Uragan 2, 700mm, .22.
When shooting I feel a noise, a loud bang, very loud in my ear, to the point of bothering me. Associated with this, I feel a jet of air coming out of the stock.
I've already checked the position of the barrel in relation to the transfer port, I've changed the oring inside the barrel, I've changed the hammer setting, but the noise is still loud. I don't feel air leaking through the probe. I feel like air is coming from under the hammer.
It has 140 Bar, shooting 29gr slug at 930fps.
What should I do to fix this? Talking to other Uragan 2 owners, no one reported the same problem, even using the same settings.
Thank you for your attention.
Send an email to Airgun Technology, for sure they can help you.

 
Did you figure out the problem?
Hi, I fix it on my own. This noise comes from the air escaping through the hole where the valve pin slides. After several tests I found a balance between pressure and hammer. I'm currently shooting at supposedly 150 bar, generating a power of 57 fpe.
At first, the hammer adjustment doesn't seem to work or generate many changes, but you have to test 1/8 of a turn each time, until you find the right point.
 
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