Surprised no one has mentioned channeling. If the shot starts off ok and then gushes this is usually the problem, in which case you may be grinding fine enough, but the issue is distribution/clumping, which can be a problem with Rocky.
I suspect the place you did the course didn't do you a favour by letting you train on top-end equipment either. Rocky and Silvia are fine, but would need adjustments in your technique.
I suspect the place you did the course didn't do you a favour by letting you train on top-end equipment either. Rocky and Silvia are fine, but would need adjustments in your technique.



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