Edgun Leshiy classic .25 help!

[Vermin hunter]

With the 250mm 25cal I have polymags running at 508fps. Reg set to 110bar.

Once I hit 12 shots the accuracy opens up and goes wild, I’m not sure what is wrong?

Please see shot string guys!

Any help of this would be awesome

 

[lbc_PSI]

Have you tried letting the reg refresh the same amount of time between shots? Seem when you give it more recovery time..like more than 1 minute..the velocity goes up. Does the gun have the stock reg or aftermarket? Some regs like Huma have a screw that slows the recovery time..it can be removed.

 

[Vermin hunter]

Have you tried letting the reg refresh the same amount of time between shots? Seem when you give it more recovery time..like more than 1 minute..the velocity goes up. Does the gun have the stock reg or aftermarket? Some regs like Huma have a screw that slows the recovery time..it can be removed.

It takes a while to crack open the stock to cock the gun, it is extremely hard to do it, I would guess it the reg has had plenty of time to refresh. I’m using the the standard factory reg thanks

 

[madeintheuk]

You could have too much hammer. The valve is possibly being overpowered. The higher pressure in the tank may help the reg refresh faster, and close the valve quicker, but as air pressure gets lower, and the reg refreshes slower, it may change dwell time and give you those readings. I’d try raising reg pressure or lowering hammer and re testing.

 

[Vermin hunter]

You could have too much hammer. The valve is possibly being overpowered. The higher pressure in the tank may help the reg refresh faster, and close the valve quicker, but as air pressure gets lower, and the reg refreshes slower, it may change dwell time and give you those readings. I’d try raising reg pressure or lowering hammer and re testing.

I thought that. Does 110bar seem low for 25cal - 250mm barrel?

Dwell time, I’m guessing that is increased decreased with reg pressure? The lower the slower dwell time, correct?

 

[Vermin hunter]

By the way I’m 17 clicks on the hammer!

 

[madeintheuk]

I thought that. Does 110bar seem low for 25cal - 250mm barrel?

Dwell time, I’m guessing that is increased decreased with reg pressure? The lower the slower dwell time, correct?

Yes, 110 does seem low. Dwell time is the amount of time the valve is open before the air pressure behind it closes it again. The higher the reg pressure, the faster the valve will close. If it is overpowered by too much hammer, the valve will be open for longer than it needs to, and the gun will lose efficiency, accuracy, and the spread will increase. The reg and hammer need to be in harmony to create a smooth shooting gun, but a cheat is to make sure reg pressure is higher than you would normally use. This will help close the valve faster and give you a snappier shot cycle. Less wasted air behind the pellet, equals better accuracy and higher efficiency.

 

[Vermin hunter]

Yes, 110 does seem low. Dwell time is the amount of time the valve is open before the air pressure behind it closes it again. The higher the reg pressure, the faster the valve will close. If it is overpowered by too much hammer, the valve will be open for longer than it needs to, and the gun will lose efficiency, accuracy, and the spread will increase. The reg and hammer need to be in harmony to create a smooth shooting gun, but a cheat is to make sure reg pressure is higher than you would normally use. This will help close the valve faster and give you a snappier shot cycle. Less wasted air behind the pellet, equals better accuracy and higher efficiency.

That’s awesome. Thank you for the info!
When I check pressure when the reg dropped back to my aim point it was 125bar after the peak. I think the reg needs to be around there for polmags 26gr

 

[Scouty]

By the way I’m 17 clicks on the hammer!

Somethings seems off. I have a 25/250 Classic with the full sub-12 kit installed. I think at 65 bar I'm getting just below 500 FPS shooting Polymags.

If I were you I'd turn the HST way down, let's say to five clicks from zero and testing your speed, then turn up another click and testing again. Keep doing this until speed stops increasing. You could start this all the way at zero but that might not even be enough strike to fire the pellet.

Before installing the sub-12 regulator I was getting nearly 800 FPS with the 25/250 setup at 110 bar on the regulator.

 

[Vermin hunter]

Before installing the sub-12 regulator I was getting nearly 800 FPS with the 25/250 setup at 110 bar on the regulator.

How many clicks from 0?

 

[Scouty]

How many clicks from 0?

I would bet it was right around 17 but I don't have it written down anywhere.

I notice you're in England. Is it possible it has the sub-12 hammer spring installed by a previous owner? And you're sure it's the factory regulator?

 

[Vermin hunter]

I would bet it was right around 17 but I don't have it written down anywhere.

I notice you're in England. Is it possible it has the sub-12 hammer spring installed by a previous owner? And you're sure it's the factory regulator?

I am original owner. Yes 100% factory reg

 

[beerthief]

I have same gun 250 clastic .25 used and i only get 11 shots per fill , that way when i got it , changed to .177 and same shot count , i need to investigate HST

 

[Scouty]

I am original owner. Yes 100% factory reg

Okay. I read about anti tamper devices on Classics over in England but I'm guessing that doesn't apply to you since you seem to be able to turn the HST adjuster.

I'm very puzzled by your your low FPE at 110 bar & 17 clicks from zero.

 

[Vermin hunter]

Okay. I read about anti tamper devices on Classics over in England but I'm guessing that doesn't apply to you since you seem to be able to turn the HST adjuster.

I'm very puzzled by your your low FPE at 110 bar & 17 clicks from zero.

I retested and found 19.3fpe!
33 shots and laser accurate.
Happy now