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.

 

[The BB Bandito]

@BSJ @Vana2 @Vetmx @Motorhead @gxs

Thanks for the help and suggestions. Learned somethings on this one.

Seems like the culprit was a poppet valve. I have it back to shooting <.5” @ 25yds (good enough for me) and got another squirrel this afternoon. I made an edit to my initial post above to cover it a little more in depth.

 

[SAZ]

I have a supply of JSB and AA 10.3's, and I don't believe that I have encountered these new and different pellets. Is there an easy way to differentiate these from the old ones? You mentioned "new packaging". Is it obviously different? Sounds like I might be in for some pellet testing if these new ones don't perform as the old.

I believe this may be the "new packaging" that @Motorhead is referring to. Maybe not.

 

[SAZ]

I haven't shot any of the "new" ones yet so I can't comment about how well they work.

One thing I just noticed in the picture is the new tin shows "4.52mm" and the old tins just have "4.5 mm" on them.
It has seemed to me that the AA 10.3 gr pellets always fit slightly more loose than the JSB 10.34 pellets.
I haven't measured any, but I wonder if the head size has increased ever so slightly and they're not working as well in some guns?

 

[Motorhead]

I haven't shot any of the "new" ones yet so I can't comment about how well they work.

One thing I just noticed in the picture is the new tin shows "4.52mm" and the old tins just have "4.5 mm" on them.
It has seemed to me that the AA 10.3 gr pellets always fit slightly more loose than the JSB 10.34 pellets.
I haven't measured any, but I wonder if the head size has increased ever so slightly and they're not working as well in some guns?

The Older AA tins as shown above have a white sticker on tin bottom, generally they have always been marked as 4.52 sizing.
* these from 2017

 

[SAZ]

Duhhh...I should have checked that.
You're correct, the 1 tin of old ones I have left are marked 4.52 as yours are.

If you figure out why the new ones aren't doing as well I'm sure we'd be interested. Thank You.

 

[Motorhead]

Duhhh...I should have checked that.
You're correct, the 1 tin of old ones I have left are marked 4.52 as yours are.

If you figure out why the new ones aren't doing as well I'm sure we'd be interested. Thank You.

Won't be the one to figure that out .... As I'm sitting on about 4 sleeves of 10 tins per sleeve of the same lot # that is going last me the rest of my natural life.