FX WC Wandering POI, penny for your thoughts.

[intenseaty22]

@dairyboy Yes, holding same. However, at 28 yards a PCP should not be that hold sensitive. For that I can save a lot of money and frustrations and only shoot Springers. 

@hussn32 Indeed. I keep asking @fx_usa about the "Superior" liners, they are supposed to come out in .177 at some point, but I've yet to hear from them. 

@tor47 Barrel has been cleaned & polished. I don't have to clean my Crickets this much, ever. I know there are guys out there that never clean their FX liners and their guns shoot well, or so they say. As for the different kind of pellets, it doesn't seem to matter what I do. I shoot 8 shots of the JSB Monsters into a single hole, test again in a little while, same POI, test again and it has gone to hell with no explanation whatsoever. 

@bubblerboy64 Have verified the scope is not the problem. I have changed the scope a couple of times. I have also shot the original scopes that came off the WC in the other guns and the other guns are shooting perfectly. 

@rj I can tell you that there is no o-ring in there. I looked. Will look for the size and see if I can source from somewhere and install. Hope that is the problem. Pellet probe is spot on. Have meticulously measured each time I take gun apart. All screws are on tight. 

Thanks to all again. 

 

[elh0102]

Just shot it again and the darn thing became a shotgun again. Same ammo, same everything, gun was cradled on shooting bags, has plenty of air. Mind boggling!!!

I can offer two words of advice, Taipan Veteran! I'll never own another FX rifle with a liner system. The combination of liner, sleeve, shroud, moderator, and associated O rings and fasteners is, IMO, simply not conducive to maintaining a reliable POI. I had a Crown, and I would not even consider taking it hunting, for the very same reason. I realize that I'm the contrarian here, and most folks love the super adjustable FX rifles. I wish them, and you, the very best, and I hope you find the solution. 

 

[intenseaty22]

@elh0102 Have one already, & 2 Crickets. Wanted something in .177, this showed ip as a “good deal” Will probably sell at some point, but I will never pass it down unless I have it shooting good enough to sell. 

 

[tor47]

There are orings in here?

 

[intenseaty22]

No, the front liner screw. The one that holds everything together inside the barrel. 

 

[Odoyle]

I had the same problem with my vulcan 2.Poi shifts from one day to another.I tried everything.Then one day i decided to remove scope rail bolts and i put some loctite on the threads.I tightened the bolts very hard.More then i should but not so much that i damage the threads.I had no problems since.

BINGO! ☝

 

[Chuck-in-Ohio]

Not only is there supposed to be an O ring inside the liner locking nut, there is supposed to be one inside of the breech end of the barrel sleeve that the liner presses into.

When you insert the liner into the sleeve, you should feel it hit, then press past an O ring before seating fully into the brass transfer port.

If either or both of them are missing, therein lies your issue.

 

[Odoyle]

I think I know what could be the problem. It's possibly the free flight hammer system. I would clean everything maybe debris and gunk inside and try inspecting the hammer and spring and maybe even try pulling at it a little and flipping it around.

 

[intenseaty22]

Well, the ine inside the liner locking nut is missing. The one in the breech end is fine.

As for the hammer assembly, it’s the only thing I did not take apart. That, if needed, will be for another day.

Gun shooting accurately again, I think, FYI. Go figure. Either that, or the last 2 chipmunks I just shot are the unluckiest sob’s there ever were. 

 

[hussn32]

I shot my wc mk3 sniper .22 yesterday. First 10 shots were the same hole, next 8 shots hit 4 inches to the right . Put in another magazine, they all hit same hole. Gauge was at 190 bar, refilled it to 230 bar . It was shooting to the left again. I readjusted the scope again to center. I pushed and pulled the barrel in different directions and it still hit dead center. So I don’t think it’s a barrel or shroud issue.

 

[Chuck-in-Ohio]

You can try the old tape wrap to snug the liner in the nut if you can't source an O ring quickly enough.



There may very well be enough shim sham going on in the liner lock nut to let the liner shift around enough for your POI to walk.

 

[intenseaty22]

I have an O ring kit for it from Mr. O ring. May have it in there. Just need the size. Will look at schematics. O/W can try Teflon tape. 

 

[Chuck-in-Ohio]

I believe that they should be 7x1 NBR70.

 

[Odoyle]

I shot my wc mk3 sniper .22 yesterday. First 10 shots were the same hole, next 8 shots hit 4 inches to the right . Put in another magazine, they all hit same hole. Gauge was at 190 bar, refilled it to 230 bar . It was shooting to the left again. I readjusted the scope again to center. I pushed and pulled the barrel in different directions and it still hit dead center. So I don’t think it’s a barrel or shroud issue.

First check your pellet pusher/probe is centered to the breech and tightened.

Try single loading first for a 30 shot group on a single target.

Then...if same issue...

Try tethering the tank at 200bar constant if possible. If you don't have an inline adjustable regulator use a tank that's at around 180-200bar and crank it open all the way and test for groups till infinity then you will know for sure what's the problem.

 

[hussn32]

Thanks Odoyle, I will try this weekend 

 

[douger]

my wildcat or cats iv had have always been very accurate never a issue no barrel band or shroud removed either just really weird you guys having problems my crowns same way never a issue maybe the ultra light 700 mm might need something i tried one onmy 600mm crown ultra and no difference 

 

[Rj]

Good points above. Single load and check. Mags distorting pellet skirts have caused many a headache. 

 

[intenseaty22]

I did do the single load thing. Same difference. Probe looks good too.

That 7x1 is ID or OD?

@odoyle I was actually gonna test that same tethered thing next time. I’m getting funny feeling it’s shooting better when above 180b. Seemed to be off at 150b I think. Reg has been working really well, set at 110b. 

 

[hussn32]

Mine does it with pellets and slugs. I can be shooting on the gun rest and just all of the sudden it shifts poi. The gun is in the rest not getting moved around and suddenly shifts poi. I am leaning towards the air pressure in the tank changing is the culprit.the tank tethering idea is something we need to try.

 

[Rj]

I only tightened the clamps to the tube with at least 100+ bar in the tube. Did it once when empty and you couldn't budge the screws. It does expand.