Air Venturi Avenge-X regulator creeps downward

[superduty250]

I have a .25 cal avenge-x tactical bottle version and have been shooting a lot of full strings while tuning. I have noticed a gradual regulator pressure drop as the bottle pressure drops starting around 3000 psi or so. Searching these forums, I found that AEAC Steve says this is normal for the rifle. Are there any mods or tweaks to improve the regulator to keep the regulator pressure more constant at its set point? I know there are aftermarket regulators for more high-end brands like the FX but I have not seen anything for the Avenge-X.

I just started working a tune using Steve's process for 910 fps for the JSB 25 grain pellets. So far for my first attempt I was able to get an ES of 16 and a SD of 3.5 over the first 100 shots so I suppose it's not that bad. I just purchased the rifle last month and have gone through about 1800 of the 34 grain pellets and 600 of the 25 grain so far. Should this be enough to get it broken in completely?

 

[nervoustrig]

Regarding the regulated pressure changing with the reservoir pressure, the term is input regulation rather than creep but they do share a common cause.

Drop in Reg Pressure over a string of shots

I’m bugging you guys once again from Patagonia, Argentina with a couple more issues on my Impact MK2. I am getting a drop in reg pressure of about 10-13 Bar over a 50 shot string. I have a MK2 .25 with Power Block and 72 Power Plenum Upgrade, slug kit. Shooting 34 grain slugs at 945fps...

www.airgunnation.com

I just purchased the rifle last month and have gone through about 1800 of the 34 grain pellets and 600 of the 25 grain so far. Should this be enough to get it broken in completely?

Yes, that is more than sufficient to be broken in.

 

[superduty250]

Regarding the regulated pressure changing with the reservoir pressure, the term is input regulation rather than creep but they do share a common cause.

Drop in Reg Pressure over a string of shots

I’m bugging you guys once again from Patagonia, Argentina with a couple more issues on my Impact MK2. I am getting a drop in reg pressure of about 10-13 Bar over a 50 shot string. I have a MK2 .25 with Power Block and 72 Power Plenum Upgrade, slug kit. Shooting 34 grain slugs at 945fps...

www.airgunnation.com

Yes, that is more than sufficient to be broken in.

Thanks nervoustrig for the link, lots of info there! I should have been able to find it myself, but apparently I didn't hit upon the best search terms.

For now, I'm just not going to worry much about it until I check out the accuracy of my tune. So far I've just been checking fsp spread and std. My regulator input pressure is dropping from 150 down to 130 bar over 100 shots but does not seem to impact the fsp all that much until the bottle supply pressure gets below the regulator set point. It's too cold in Virginia right now to get out of my garage!