Fx streamline. 22 accuracy

[Blejda]

Hi airguners

My 2 years old streamline has become less accurate after about 2000 pellets. Before it was shooting under 1/2'' groups at 50y every single time and at 30y single hole little bigger then the pellet now it shoots about 1''or a little more at 50 and about 1/2" or bigger at 30.

Rifle is still consistent and have almost the same speed. I tried different JSB pellets and different batches even cleaned the barrel.

Any ideas? 

 

[Revoman]

 Like to hear others thoughts too.

 

[bubblerboy64]

 

Check the crown make sure no damage.

Check the scope 

check for parallax error 

 

[JoeKool]

Clean the barrel 

Check your screws (all of them)

Inspect the muzzle end inside of the shroud with a flashlight for damage

Is the shroud loose

Check over a chronograph 

Check your hammer spring tension adjuster nut for proper position and no movement 

Check your breech or pellet probe seal / o-ring

Try shooting groups with and without the moderator 

 

[Blejda]

I have tried everything only scope change not and breech o ring. I did think of changing o ring but it is consistent about 15 fps spread. 

Thank you for your help. Will check again when I have time and let you know. 

Today my Weichrauch hw 50s arrives so streamline will have to wait a little. 

 

[elh0102]

Sounds like a fouled barrel to me. I think the Streamline has the original solid ST barrel, which is known for longevity between cleanings, but it can eventually foul. If nothing mechanical shows up, it just about has to be the barrel. I would remove it and give it a good cleaning with a brush.