Fx King .22

[Perica]

Fx King .22
I am shooting already 2 months my new fx King and there is two things that l want to ask on the forum. First, why my gun always shoot very slow first shot after fill in air and also if l leave gun for 5-10 minutes without shooting and start to shoot again same happen, first shot is slow on chrony and than is OK came back to right speed.
Second l am shooting on my King H&N Precision slugs 33gr
with velocity average 960f/s
micro w: 3,3
macro w: 19
At 75m and 100m grouping is OK but is always two or three shots gone out off the group.
l already tested many different slugs and different weight but is always same.
So l don't know is it amp regulator or tuning of the gun.
Kind regards

 

[Rick357]

FX King with 600mm barrel?
Plenum pressure set at?

As to first shot slow, I see a little of that occasionally but I have put it down to a bit of 'cold' welding of the slug lubricant when it is first shot and thereafter if it is left sitting. I don't know if that is the reason. Otherwise it could be the regulator or hammer sticking due to cold welding or lubricant being squeezed out when it is left sitting under pressure. After the first shot, yes it works perfectly. I would like to know as well. It isn't a lot of velocity change but it means that first shot is invariably a tiny bit low compared to the following shots. I was going to search through the Panthera postings as it should be seen there as well, but I have yet to do so.

 

[Perica]

Thank you Rick, much appreciated.
My King .22 is 600mm
Reg. pressure is 155 bars
Velocity average 960f/s
micro w: 3,3
macro w: 19
H&N .22 Precision slugs 33gr

 

[Perica]

Yes my friend has a Panthera .22 shooting H&N 34gr and has same problem

 

[Ranchibi]

The first slow shot with balanced valves is usually stiction. Unless you tune for very high power which opens the valve hard and get a first shot maybe just a tad bit slower, most will get that first slow shot....it's normal.

 

[Perica]

Thank you Ranchibi for your response. l really appreciated.

 

[Ries]

I have seen a topic here where a user tuned his Panthera close to the plateau. You tune it the way adding more hammerspring doesnt do anything, and back it off where there is a slight removal of velocity. This seemed to work for this person.

FX - FX Panthera first shot slow solved…

I have been struggling with Panthera shooting slow on first shot( 20-40 fps slower), and only after sitting 5 minutes or so. Also shooting slow when cold. Someone suggested putting big power wheel on 4 and small adjustment on 4, then adjusting regulator to your desired fps or 10 over at most! It...

www.airgunnation.com

This should work for the King aswell since it uses the same block

 

[Perica]

l never tried to put macro wheel on 4 and micro wheel on 4. lt means that micro wheel is on the maximum. ln Fx King/Panthera booklet they said to start on 13 on macro wheel. l tried but there is not enough velocity for
H&N Precision 33gr slugs.
Actually these slugs on my King like high velocity. l would like to go on 970 to 980f/s if is possible but maybe that would be too much stress for that gun. Please advise.

 

[ChuckHunter]

The amp regulator creeps! Meaning it doesn't hold your set pressure for a long period of time. That plateau method will help but it's just nature of the beast for FX regs. That's why they recommend a couple purge shots before you actually start shooting. I've watched a couple videos on Huma regs compared to Amp and the Huma doesn't generally need the purge and holds set point much better.
There's also a couple videos on YouTube that shows you how to polish and tune the Amp reg to get the best performance out of it.

 

[Perica]

Thank you ChuckHunter much appreciated for your response.

 

[Perica]

l was thinking to change AMP regulator to Huma regulator but l am not sure about that. l changed fx regulator of my fx Crown mk2 two years ago to Huma Gen.3 and is much better but my Crown mk2 didn't have amp regulator. l don't know what is better for King.

 

[Ries]

The AMP in my DRS is the only one that worked correctly afther cleaning it up.

If a regulator frustrates me too much, I buy a Huma.

Done that for my Wildcat and Impact. No creep.

 

[Perica]

Thank you Ries for your advice. l will polish amp reg and carry on with amp reg on my King for one period of the time. lf is still creep after that than l will change to Huma.

 

[Heyucombs]

All my FX rifles have this issue when I first bought them. I test my new rifles, and always same results with each. So now, I automatically buy Huma regs for them. Problem gone. And faster recharge rates.

 

[Airgunmann]

The king uses same valve as drs / panthera /dynamic it's a balance valve and part of it can be oring stiction id add a tad more hammer spring tension to try to tune the bad spot out

 

[Airgunmann]

My friend loves his dynamic 30 25 king and his 22 panthera there was nothing touched on the valves just new front orings and id have to say I've had good luck with the newer amp regs panathera era amp regs

 

[coastal drifter]

Try polishing the valve rod and don't use silicone to lube it, maybe a wipe a thin coat of ballistol for lubrication check your reg a gauge to determin if its reg creep, most reg creep is an Oring issue.