FX POI changes after a few shots - FX DRS

[dlancerx]

I am shooting 10.64 grain pellets at 840 fps with my Fx Drs .177, 500mm barrel, regulated at 110 bar. No matter what the Muzzle Velocity or pellet weight is, the POI keeps changing, mostly to the right (about 3-4 mildots @20meters) after 10-15 shots. Mostly after the main pressure gauge has dropped below 150 bar.
Is this normal with the drs, or is something wrong with my gun?

 

[Gerry52]

What bar is reg set at?

 

[dlancerx]

What bar is reg set at?

110

 

[Emu]

Possible problems:

- Scope rings loose.

- Defective scope.

- End cap clipping.

- Going out of regulation after X # of shots.

- filling rifle above Max pressure, so, regularion starts after some # of shots.

- Need to recrown the barrel

 

[Impact701]

Neither of my DRS rifles do that.

I would check the liner lock

And the 2 grub screws that hold the barrel in the receiver.

 

[Jlowe]

I would check the scope as well.

 

[Airgunmann]

Drs i had never switch poi so like stated above id check it all over including possibility of moderator cliping

 

[dlancerx]

Thanks, everyone. Will check as suggested.

 

[coastal drifter]

Also, if you have removed the liner make sure you re-installed it in the correct direction