My Daystate 303 is shooting wierd.

[kaylaindy]

I just got a used daystate Wolverine 30 caliber. The pressure gauge goes from Red to Yellow to Green, with red being empty. When I pump it into the green it shoots two inches low until I get to the beginning of the yellow area which is the middle of the gauge. Then I start hitting where I'm supposed to hit. Does this sound like there's something wrong? With the regulator Maybe

 

[kaylaindy]

It shoots either 2 inches high or low when I start out and the point of impact changes as I got through the air. 

 

[Dirte]

So if I understand what your asking. Daystate does not use a regulator for their guns. With a typical full fill there is a shot curve. The reason why your FPS Is down at the start of the shot cycle (you would expect it to be actually faster or poi higher) is, the transfer valve has more pressure on the back side of it, thus fighting against the hammer when it hits. As the pressure decreases finding this happy spot the shot curve is flatter causing your poi to stay in the same spot. Of course when you drop down in psi the pellet falls as expected. Picture above is of a full shot string through my wolverine .22 at a full max 230 bar. I usually shoot at the bench tethered at a fixed pressure 200 bar to avoid the curve. If I am untethered, I generally will not go that high (210ish) to avoid the curve as well.
Matt gives a good explanation in his video.

 

[socaloldman]

Oh thanks Dirte thats a great help. Thanks kaylaindy for asking.

 

[Regal_US]

Dirte is 100% correct but there's another thing to watch for. The Daystate Green/Yellow/Red pressure gauge, is in my opinion really misleading. The green section does not mean good, yellow caution, and red stop. You need a tank or pump with an accurate external gauge, and should fill either to the SWP, or a lower value to avoid the front end of the shot string curve as Diret suggested. Filling all the way to the end of the green zone will greatly over pressurize most Daystates, and might even be dangerous (probably not), but you will have one hell of a change in velocity as the tank pressure drops to the appropriate value, which varies from gun to gun. Most of the useful range starts at the low end of the green zone, and ends well down in the yellow segment.

 

[tricker]

I fill my Huntsman .22 to only 3k psi(top of the yellow zone) and start with near perfection every fill. 35 - 40 shots ,poi starts to drop. Just love the accuracy of that rifle. Tom

 

[aa_limited]

I fill my aa s510 .22 to 170 bAR and down to 130 BAR FOR FLAT SHOT CURVE EVEN THO ITS RATED TO 200 BAR. THIS IS AT 38 FOOT POUNDS.
​BUT HWNE I SHOT THE SAME GUN AT 12 FP I CAN SHOOT FROM 200 TO 115 BAR WIT A FLAT SHOT CURVE.

THIS GUN IS UN REGGED JUST LIKE DAYSTATES

 

[kaylaindy]

Thank you. That explains a lot. So I'm going to try and find that sweet spot. I would think a rifle that expensive would not really have a curve , but so be it. I will see if I can find that sweet spot because I want it to hit the same place all the time. If it's too hard to manage I will sell it but I really appreciate the information. I knew I was making some sort of new guy mistake. Thanks guys - Nate M

 

[TwiceHorn]

Well, you can spend a lot of money, all of it, in fact, and not beat physics. However, a regulator generally avoids those problems, but with some other costs (namely occupying space in your air tube).