What pellets are you using Pete? I heard some stories that the BSA barrels are tight or something, pellets needing to be tapped in with the Master of Hounds personal toffee-hammer, that kind of thing. Is the .25 altogether different to use compared to using a very heavy pellet in a .22?
I've never owned a .25 or a .20.
.20 doesn't really interest me as it will be just like a 9 fpe .177 with a bad temper, while the mortar-like trajectory and heavy impact of the .25 might be a lot of fun.