Herx77, you didn't say what RWS pellet you used and then was changed. RWS manufactures a few pellets and might even brand a few from others???
I don't own an absolute accuracy machine, and only need "good enough". If I was practicing heaps, driving miles for a comp, and to be competitive came down to a couple of targets, then what pellet does matter. Pellet choice, pellet check for consistency, and how pellets are transported, becomes increasingly important.
It does help having a rifle that can show minute differences in pellet quality and consistency. And then the shooter has be up to it too. I'd say most full powered springers can't do minutiae, just very good. The old target springers could do ten metres where light weight thin skirted pellets never got the chance to wander off far.
Pellet quality of flight really shows at the extended ranges when velocity drops and no longer enough to keep them on the straight and narrow. Poor design will start to wander.
Start point for a good pellet is always what pellet the top competitors are using and in what barrels. However, plinking in the garden using expensive match grade ammo is a bit of a waste.
I thought the thread was just asking what RWS were working for anyone and with what?? Your input also has merit, for why not to use is interesting too.
They had better not mess with my .177 Superdomes.