i have a 3 group la san marco i am using 9 grm porta filter and grinding coffee per shot
the stream of the coffee is very uneven at times and sometimes sprays all over in very strong streams
i am using a bottomless pf holder when i am dosing into the 14 grm pf its so much better the stream is steady the crema is perfect should i not use the 9 grm pf any more ?
is 14 gr extraction for 20 sec not too much coffee for single espresso
i just always knew that single shot is 7 to 9 grm am i wrong and why is the stream of the coffee going crazy when i am using the 9 grm
i can always see the head screw in my grind is that ok ?