Hi Wonky Donkey. I have no issues with your comments, thanks. But why not Hobby? I use those pellets because they are a relatively cheap flat head that I use for short range paper punching, plinking at short range and bell target at home. Yes, I could have used another make but I did not intend my tests to turn into an encyclopedia of what different pellet brands do. As it was, over several shots the difference between lowest and highest was 6fps.
In the end the HW55T is currently running around 600 fps with Hobby. Would that change with different pellets? Of course it will ... from experience I would expect around 570 with AA Field for instance. Others I could not predict, have not tried, and am not particularly interested. Now if I was fettling for a sub 12 rifle ... say 11.3, then other pellets would certainly come into the equation, but in those cases long range accuracy would be more important than chrono performance.

Now, time for supper: more eggs I guess.
Cheers, Phil