BKSinAZ wrote:My concern right now is not the 270wi grind settings, but instead my concerns are that the ECM profe is being choked at a relatively high grind setting of a 9 and 10. I suspect the choking "can" be based on a few variables or a combo of variables. 1) my grinder is over dosing, will check with separate scale tonight. 2) Tamp might be a bit over done based on the over dosage 3) Grinder 'might" be grinding much finer that what the adjustment ring shows. Again, I was barely able to pull a shot this morning at a setting of 12 on the 270wi. Too fine mixed with an over dosage = not good. 4) possible low pump bar. Was at 8 bar even when choked. Did not budge.
I suspect it's #3. I also received the grinder a few days ago and I'm using 10 gram of 12G and am getting better espresso than the 12.5 gram I was loading with my previous grinder (Compak K3). Just grinder coarser and consider reducing the dosage a bit. I would be worried if the grinder couldn't choke the machine at its finest setting, not if it's choking it with a setting that's no at the extreme.