-
Maybe not a tablespoon, but a few grams (between 2-3 I'd guess) is the norm in the sorts of grinders I worked with in coffee shops. It's a tricky thing to measure directly and I'd be surprised if the Sage only holds a quarter of a gram. That's lower than both the Niche Zero & Baratza Sette which are the go-to for low retention grinders without spending ridiculous money.
There's also the point that not all retention impacts the coffee equally. The stale grounds left in the chute will have a much bigger impact than the stale coffee that ends up getting compressed and caked in all the nook & crannies. Given that the former will be stale coffee that ends up in your new shot, the latter will not.
I found this to be a pretty decent overview: https://clivecoffee.com/blogs/learn/grind-retention
mmccarthy-
Yep, my Iberital is terrible for retaining grounds when clean but when I let the insides fill up with old stuff, it's almost zero retention in terms of g in to g out. I tend to run a few beans through before first shot in an effort to ensure as little of the coffee which can actually move is old, and am then happy to avoid regularly cleaning it bar the odd bit of burr cleaning granules.
-
I'd be surprised if the Sage only holds a quarter of a gram.
I measured it by shaking the grinder out and collecting what fell out after grinding my morning coffee. Is that an unreliable way of doing it?
Scrabble
Stonehedge
How bad can retention be in some grinders? I've only owned two low to mid end grinders and both had a little bit of retention but easily less than one gram. On our Sage probably closer to quarter of a gram. Are there grinders out there that dump a tablespoon of previous grind out?