I polish the skirt on mine to save having to allowing for the pellet to take wind.
I used to soak them in Blue Stratos but now use virgins water.
Also try pulling you barrel through with a Topic wrapper tied to a unicorn pube !
Or alternatively .......................
Try testing some pellets ,straight out the tin if they can group inside of 15mm at 55yards or tighter whether that be of your own ability or off a bench , then buy as many as you can afford , take the tape off the tin and shoot the fxckers !
Ask Wagger I told him same on Saturday, I have posted this before or similar some time ago but got poo poo'd
Hope this helps
You can try chanting Terristrial Mollosuc .................. Ask Gilly , that just his back up chant if Marc doesn't turn up !