another_jim wrote:Yes it does. Before I put it in, I tried overfilling with water too eliminate the air pockets, and got the same mess. Your technique doing this must be better than mine though, since I also diluted my shots.
What do you mean by diluted? Not enough pressure?
Hmm.. would a large air pocket have the effect of slowing the ramp up of pressure? (Pre-infusion? Thinking about Jepy's experiments with pressure profiles
) If you put enough water in you could get a full 2oz with water still left in the chamber . . .
My 'technique' is fairly straightforward, start with the arms down, pour in water while raising the arms (do both slowly), then when the piston is at a good height stop raising the arms while continuing to pour water. I'll stop when there is a little water covering the top of the piston and no bubbles come up through it.
Sometimes it is necessary to jiggle the arms to coax the air out.
I wrote down everything here- http://unmodifiedpresso.blogspot.com