FX Impact X MKII unable to maintain zero

WELCOME TO MY WORLD!!! Is the barrel etc ALL tighty tighty? Did you lean the barrel shroud or bump or drop it or possibly maybe anyone in your household and not fess up? FX no limits ALL tightly tightly too? That's another factor. YO!

I just finished today first time tuning my new 25 cal Impact PP, I was watching the numbers on the chronograph, in every string the very first shot the number/digit was slightly off. The timing between shots about 15 seconds then reset the chrony and the timing between strings (of 5 shots) was about 2-3 minutes per say.

Now, I can understand that orings, springs and seals still settling down, this my is still a new gun.

But I have seen this behaving earlier on my previous non FX - non regulated 22 as well. 1" higher and right POI was not strange to me on very first and maybe second shot as well.

I may be wrong but somehow believe something to do with waking up the hammer spring from relax state??? Not really to throw away the effect of the air temperature as well, we compress air inside a chamber that creates temperature differences between surrounding parts. No matter what is a room volume there inside but the number of molecules you can fit in may vary, and then you expand that number of molecules and you got a totally different "plenum" volume?

I would like to know as well how to go around this behaving, but I learned earlier and I don't believe that is possible to tune a gun yesterday and today just grab it from a case and behave 100% as you left it yesterday. I am not talking hunting or plinking games, I am talking scoring numbers.

Is your silencer permanently attached or threaded and do you thread it off and on? That too could potentially throw things off. YO!

Waking up a hammer spring that's totally unacceptable. Perhaps blowing off the first couple shots before target shooting to wake up the reg??? That's what some of the pros do. YO!

Sounds like your reg is creeping. What do your chrony numbers show from one session to another?

Since you’ve already tried a few things without success. As far fetched as it sounds, do you have another scope to mount? It might be a scope issue... Also are you shooting the same projectiles each time? You just stated you were shooting pellets/slugs?

"The issue I'm having isn't only with the first couple shots then it levels out. It stays 1" ~ 2" inches higher than where I previously zero'd it a few hours before." ????

Are you saying that your POI will jump up 1 or 2 inches at 30yd, every five hours without touching anything on the gun? If you don't touch anything and the reg stays the same, then it must be the scope. Take this from me a complete noob.

The scope is worth checking out, but I doubt that it is the problem. One way or other, I believe your answer lies in the barrel assembly. I had disappointing POI consistency with a Crown, and I'll never own another sleeve/liner system. But, there are many satisfied FX owners who have no problem with them. I would take it apart, clean the liner good with a brush, reassemble carefully and test. 

 Pretty new to all this but I too just got a (late dec. Early Jan) impact in 700mm 25 Cal but I haven't received my pp yet . I have not had this issue but I am a little confused. If you zero and then it's 1-2 " high a little while later if you rezero and wait it does it again . What happens if you don't re zero shoot it where it's high and put it down wait a couple hours and shoot again will it be another 1-2" high?

I hope I am explaining this right . So if you did this 4 times over 24 hours would it be 4-8" high or would it stay the same 1-2 inches high that it did originally



Thanks

Dan 

Just scanning this and thinking out loud... did you zero the new scope near the optical center, or are you zeroed near the end of your elevation turret's range? If you are zeroed with a lot of compression on the springs that shift the optical tube inside the scope, perhaps there is enough pressure from the turret mechanism that it's gradually shifting the tube in the elevation direction over the time that it sits? The fact that it doesn't shift back after a few clearing shots makes me question it being the pneumatics. After the POI shifts the 1" - 2", is it shooting at the same fps as before the shift?

Like I said, just thinking out loud here. Let us know what you find. Definitely interesting.

Hi m021478,

We are sorry to see that you are having these issues with your rifle! We are more than happy to assist you in finding a resolution to this problem.

If you are located in the United States please feel free to reach out to us at our customer support email at [email protected], or you can call us directly at 866-639-0772 Opt 1 to speak to a customer service representative.

We look forward to hearing from you!

Best Regards,

FX Airguns USA Customer Service Team