Did you notice a rising or falling velocity trend over the whole fill? plotting the shots on a graph is a good way to visualise this. If so then your consistency over 30 shots would likely be better than over them all, in which case it is not too shabby. Try it with weighed pellets, I would expect the spread to be halved.
HFT, for people with only 2 buttucks!
VooDoo TwoTwo The next chapter.