Daystate Alpha wolf slow first shot

[sean48855]

Well as the title says my alpha wolf has a slow first shot. Anytime the ecu powers off, when I cycle the safety and shoot the first shot is 20-50fps slower than my setting. Both in factory mode and, it will do the same in the advanced mode. Has anyone experienced this? It shots great after the first shot. I bought the gun used from airguns of Arizona and the test card they sent with the gun shows the same thing. This happens if i set the power off to 1 min it'll still do it with the reg pressure reading 122bar where it is set so it's not a regular pressure problem. Any thoughts?

 

[shambozzie]

It's your lucky day. Been hatched out in detail. The Search feature is your friend. Hint 135 max reg pressure will cover your needs up to .30 cal.

 

[sean48855]

It's your lucky day. Been hatched out in detail. The Search feature is your friend. Hint 135 max reg pressure will cover your needs up to .30 cal.

I have set the reg up how @Centercut said to I'm at 122 bar 30 cal at 875fps and its only when the gun goes to sleep. If I set the timer for 30sec it shuts off I flip it on and shoot around 20fps under target speed if it don't time out it shoots very consistent. I just checked the gun it's been sitting for about 10 hrs reg has went up to 125bar I'm 99.9% sure it's not a pressure thing I do need to check to see what firmware I have in the gun was just hoping for someone with experience with this problem maybe the gun needs to go back I don't know was trying to avoid shipping it back to aoa I just got it Wednesday

 

[tsakula]

i solved same problem with lowering reg pressure. try lowering little bit

 

[sean48855]

i solved same problem with lowering reg pressure. try lowering little bit

I will try that today

 

[B_y_r_o_n]

Not sure about cause of pressure drop on first shot, slight leak or regulator. However, have you tried dry firing the first shot without a pellet/slug and is the velocity where it should be on the following, 2nd shot?

Just thinking out loud.

 

[dan_house]

Byron beat me to it.... burn the first shot

 

[Franklink]

Two different people have suggested lowering the reg.

I've had much more experience with a Ghost than an Alpha/Delta, but the valve is the same in both platforms For the way the valve behaves when installed in a Ghost, you want the lowest reg pressure that'll achieve your desired fps for that particular projectile.

Trying to run with a higher-than-necessary regulator pressure = low fps on first/cold shots.

 

[sean48855]

I will try that today

I set speed in factory mode and raised the reg up 2-3 bar every 5 shots and at 112 I hit my speed and my first shot is much closer thank you

 

[sean48855]

Byron beat me to it.... burn the first shot

I got this to replace my fx impact so I didn't have to burn the first couple shots

 

[dwcawlfield]

I got a bit more info on this issue from the tech specialist at AOA. I see the same issue with my gun in both speed-regulated and advanced modes on either pellets or slugs. He says the issue acts like the valve is a little sticky on tie first shot after resting for a while. If you are using the advanced settings, the voltage setting and the regulator pressure need to be adjusted together because this problem gets worse if you have too low a voltage setting for a given regulator pressure. If you lower the voltage, you must reduce the pressure. I'm going to try starting with one of the built-in sets and moving voltage and regulator pressure in roughly the same proportion. The advantage of this approach is that you can increase the shot count quite a lot for a small reduction in velocity/energy. The factory-installed sets can be a guide.

 

[dwcawlfield]

Here's a follow up from my tests. Starting with the 2225 set that comes with the gun, I was getting 970-975 FPS from JSB Monster .22, with some pretty substantial variability in velocity, and shot count seemed limited to less than 100 shots. So I reduced regulator pressure from 145 to 130, voltage from 72.5 to 68, and increased dwell from 2900 to 3000. Now no slow first-shot. Here's a test using a Garmin Xero Chrono at the muzzle, with silencer on. It shot nice one-hole groups just about .15" below where the faster set put them. I see 92% correlation between the Alpha Wolf's chrono and the Garmin, and the difference in the averages is easily the result of pellets passing through the suppressor. Nice!

Chronograph Test Results​
Pellet	JSB Monster .22	Voltage	Dwell	Regulator
Set	X-25	68	3000	130
Shot	Gun Chrono	Xero
1​	927	927.5
2​	930	928.4
3​	931	930.8
4​	931	930.6
5​	933	932.3
6​	929	929.6
Avg	930.2​	929.9​
Stdev	2.0​	1.7​
Gun Chrono Offset fps	0.3​

 

[msg1979]

Could it be because of a small creep in the regulator?

Its the same problem on many fx airguns.
The reg creeps 2-4bar after x period of time. When the hammer then hits the valve its 2-4 bar "harder" and does open that much - resulting in a fps drop. Next shot the valve havent got x period of time to creep and fps is spot on due to correct reg pressure