As far as filling goes, the sweetspot on my baby starts at 180bar.
I used to fill to 190 but that only cost me pellets while I waited for her to settle
Now I fill to 175 to 180 and dry fire once, then I know she's sweet.
Pellets, AAF's FX and H&N-FTT. I have just been trialing Crosman Premier Ultra Magnums and my best one hole grouping now at 30 yards is down to 7mm (in .22 cal) so I am VERY HAPPY using these They are a little lighter than the AAF's and the FX, but the permormance is equally as good as, if not better than what I previously used.
Tony