Reply To: Fx impact

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That's a pretty high regulator pressure for shooting .22 caliber.  My regulator manometer registers just a sliver above 100 and I'm producing 44.1 Joules at 274 m/s.

My first suggestion would be to "thoroughly" clean the barrel again.  Use Ballistol or other similar cleaner/lubricant. WD40 and o-rings don't play well together.  Keep the WD40 in the garage.  Your airgun will thank you for it.

Second, reset all the settings back to factory specification if not already there.

Hammer Spring Tension – 18.5 mm

Regulator Pressure – 110-115 Bar

Valve Control Knob – 4th line

Once back to factory specs, start shooting over the chrony.  Raise regulator pressure, if necessary, to get a starting velocity of 274 m/s.  This will give you a good starting point.  Shoot a bunch of mags through the rifle to allow the barrel to settle back in.  Most people find the greatest success when tuning for the 18.13 gn at velocities between 274-280 m/s.

Good luck and keep us informed of your progress.

Happy Shooting!

Thanks a lot.

I saw AEAC video and that was really helpful.

Yesterday morning I decreased regulator pressure to about 115. Also I cleaned barrel again with cotton. (Today I searched for Ballistol but I couldn't find one of them. I bought dry lubricant which use for hardware until I find it.)

After that I had been shooting with clean barrel and speed around 280 with sovereign 16 pellet. The accuracy was good but half of my pellet was flyers. So I reduced speed to 268. Now I still have some flyers but not that much. I closed valve adjustment one line.

My conclusion is twist rate is too low that when pellet leaves barrel turbulence behind them make them wobble. With naked eye I see a Silver pellet that fly's and plinking to the target which show's they are flyer. There is a struggle between speed and turbulence. If I decrease speed in order to get rid of turbulence rotation of the pellet become less. and if I increase rotation by speeding up the turbulence become greater.