in his first post he's saying "58.0mm tamper gets stuck by the rounded bottom of the basket" and you advise him to replace his basket or to modify the shower screen

later he's saying "the level is just under the bottom of the ridge. In my case #2 (ie what I usually do), I get the same level as you."

lets look at the same dose/tamp picture from another angle shall we?



if he's dosing/tamping and getting the same level as mine then how come the tamper gets stuck by the rounded bottom of the basket may I ask. Seems impossible to me

I'll repeat again, he's downdosing for sure. Which means he has to use more coffee. All he has to do is grind one or two notch coarser, dose more, moderately tamp, longer cooling flush, lock portafilter, push the button and that's all. At my previous post I wrote all that shower screen stuff for him to see that rancilio's has a diffrent design compared to others so he shouldn't care about the coffee touching shower screen cos already the bolt and group head design won't let him to lock his portafilter if he doses too much.

miam-miam wrote:I saw the 12/14g baskets here http://www.pasmarose.de/catalog/index.p ... 119_81_207 but maybe it's a typo?

Take a look at this --> http://www.pasmarose.de/catalog/product ... ee178006b8

It's the exact same 40-100-001 coded 7gr single basket, but from older (2008) "accessories" catalogue which is not available at rancilio site anymore but you can reach it from google cache or archive.org



besides at german site they are not saying it's 9-10gr basket (though that's what the title implies), at description they are saying "Rancilio under 9-10g"

I use a flat bottomed 58mm tamper in a Rancilio Silvia double basket without issue. I'm using two very slightly overfilled scoops of beans from the Rancilio supplied plastic scoop. No binding.

Ok, thanks for your answers.
Actually, I'm realizing that I was not clear in my first post: the day before yesterday, I've been downdosing on purpose (vs my usual dose) and my goal was to find out the impact of a greater headspace for the puck to expand. I downdosed to the point where the puck never touches the screen, and that's where I got stuck by the rounded bottom.
I wanted to find it out by myself, but maybe I should have asked what is the gain/loss of a greater headspace, or if we just don't care.

It's said above but I'll just second the motion, I got a slightly larger ridgeless double basket and love it. I dose it with 15.2 grams and I never have an issue with the screen or screw. There will be some minor screw imprint after the shot but nothing to worry about. Less coffee on the screw/screen makes cleaning easier too.

Ok i have a Synesso Double Filter Basket - Unridged http://www.coffeetamper.com.au/shop/images/large/synesso-double-unridged.jpg
and a Pullmam barista tamper http://www.coffeetamper.com.au/photos/barista/large/barista-black-white-insert-0608.jpg

I am facing the same issue with miam-miam.
If i lock at this angle

and at the level of ridge (i dont have ridge but the issue is distance)


The shower screen disturbs the puck.I am now dont bother of that because i can get better shot everyday and if i downdose i get early blonding transparent shots. Even though this progress is made because i learned to control temperature. I usually lock at this angle to get the problem solved.Is really the temperature the big issue rather than the disturbance of the screw?

At this angle i think it is just before pressure lost and side water comes out.
This is the 2009 silvia showerscreen,i dont know if its changed.I only know that there sits a giant screw.

I have tested kahvedelisi advise but i want him to be more specific.What means dose more? I overdose and then i remove the coffee that is over the orifice of the basket with the rancilio scoop handle.I also do a similar to this video dose and tamp with my mazzer mini and without his underpressure technique