FX dreamline .22 accuracy issue, barrel need to settle down?

[LIYAN]

FX dreamline .22 500mm barrel, JSB 18.13gr, 600 fps low power at home.

Hi guys, I just shot some pellets after work, distance is 11 yds, as you can see in the photo below, the left group is my first 5 shots, the POI moved from up left to the bullseye gradually. The group on the right is I aimming for the digit 8, 5 shots, absolutely one hole.

I understand sometimes the reg need to settle down after a period if the gun is not fired, so I took a few dry fire before shooting, and I could see from the reg gauge that the reg pressure was good and stable. Last night this gun was a tack drvier just like today's second group. I have shot 2000+ pellets through this gun, did not notice this accuracy issue before.

So what do you think the problem is? Does barrel need to settle down as well? 

 

[Exitpupil]

Shooters need to settle down. Level of concentration is a factor. Your pic shows 2- 5 shot groups, not a significant sample size for any conclusions.

 

[LIYAN]

Exitpupil, thank you for your reply, I shot with a shooting rest. I'll continue to focus on this issue next few days.

 

[Rj]

When's the last time you cleaned the barrel? Try single loading the pellets also.

 

[LIYAN]

When's the last time you cleaned the barrel? Try single loading the pellets also.

Thank you. I cleaned the barrel few days ago, maybe less than 250 pellets.

When you say single loading do you mean that the magzine may deform the pellets? But I did not see any pellet deformation.

 

[Ranchibi]

Try bringing up the FPS and see if that helps.

 

[LIYAN]

Try bringing up the FPS and see if that helps.

Thanks, I'll try that.

I have to avoid the blast when shooting at home, so it's on low power (reg 120bar, transfer port low, power wheel min) , muzzle velocity is around 610fps, can be power up to 930fps with jsb 18gr when reg is still 120bar, with fx power plenum.

 

[Rj]

When's the last time you cleaned the barrel? Try single loading the pellets also.

Thank you. I cleaned the barrel few days ago, maybe less than 250 pellets.

When you say single loading do you mean that the magzine may deform the pellets? But I did not see any pellet deformation.

Yes, just to eliminate the possibility. There was a recent thread on this. Low power setting with the mag causing flyers. Give it a try.

 

[Yo]

Even if you use a shooting rest there is still a possibility of canting the gun human error. Use a bubble level and make sure the bubble is always in the middle when taking the shot. YO!

 

[LIYAN]

Even if you use a shooting rest there is still a possibility of canting the gun human error. Use a bubble level and make sure the bubble is always in the middle when taking the shot. YO!

Good idea, I'll try it today, thank you~

 

[LIYAN]

When's the last time you cleaned the barrel? Try single loading the pellets also.

Thank you. I cleaned the barrel few days ago, maybe less than 250 pellets.

When you say single loading do you mean that the magzine may deform the pellets? But I did not see any pellet deformation.

Yes, just to eliminate the possibility. There was a recent thread on this. Low power setting with the mag causing flyers. Give it a try.

Yes, I've noticed low fps cause more flyers，accuracy is more sensitive to distractions.