Doram And if one gets channelling with a 14-15g dose, doesn’t it make more sense to improve grind and puck preparation rather than trying to hide the problems with a thicker bed of coffee?
This is basket, beans and roasts dependent. It is nothing to do with the puck prep or hiding the problem as far as up dosing is concerned.
The IMS 26, it is supposed to be 14-18g. Dosing anything less than 16g, just won’t work, at least for me. I get channel or the pour is faster. The basket is barely half full. It needs at least 16g, while 18g is the max.
Similarly, on the triple basket — IMS 32, dosing even 22g fills the basket only a half. I don’t get channels but get craters. I fill 24g and still the basket is only 60% full!
If I want to dose 14g, I get 12-14g basket and won’t use the 18g basket. Otherwise, I will use the single basket and can get away dosing 11-12g!
Doram Is it not true that actually huge doses are harder to extract properly?
I have seen this when I load my triple. Grinding coarser and/or put up the temp by a C at least works for me.
I think the roaster might be assuming you dose 16g if using the 18g basket. He may be using a triple to dose 19g.
The blend is typically an espresso roast ? I would expect it to be a bit fluffier than the SO. So, I would dose a gram less (like decaf) on the 18g. basket
I really do not think there is any commercial motive in their recommendations.