Umarex How does this barrel crown look?

[The BB Bandito]

Sounds like the airgun has been thoroughly gone over. Maybe try another scope?

Seen a scope that was adjusted too close to its maximum, got bumped and the erector tube started "floating" causing the groups to open up.

Have you checked/confirmed that the parallax was properly adjusted? That could easily throw the POI off.

Good luck!

I have a scope from one of my comp 22lr’s on it and its never had an issue with any of that. I did completely tear it down and replace the poppet valve last night. I’m gonna reshoot it this morning.

 

[The BB Bandito]

No one here mentioned any orings. Did you check if your breach oring is ok? If your shots become erratic then you could also be losing air somewhere you're not supposed to and this leads to inaccuracy.

I had a small oring on a transfer tube of my Hatsan rifle go bad and it led to all sorts of performance issues.

I did tear down the gun to replace the poppet I removed the barrel as well to inspect it and the O-rings. I didn’t find anything crazy. I greased the seals and torqued everything down. Verified pic rail and barrel screw was nice and tight.

The old poppet valve had some discoloring on the stem. I’m assuming from heat perhaps. It didn’t look pitted or anything.