That's superb,125 , I'm going to have to get some practice in this weekend....... or start thinking up some excuses!
As for pellets, I've never tried any others but I'm using RWS Hobby and when I miss I know it's not down to the gun or the pellets, it's me every time.
If I rest my hands on a table and hold the gun in two hands I can get excellent groups so I'd definitely recommend them if you fancy a change. I think they're fairly cheap compared to some others as well, always a bonus.