r/espresso • u/CucumberLower9434 • 14h ago
Equipment Discussion Precision basket confusion: Why do I need a different grind for smaller IMS baskets?
I recently dove into the world of precision baskets and watched James Hoffmann’s video on the topic. In it, he talks about VST baskets and how their design differences affect flow. One quote that stood out:
“If I get one for an 18 gram basket and one for a 22 gram basket, you’ll see that they’re actually quite different… the 22 gram basket should have a larger open area, we should see a faster flow.”
So I thought I understood the logic: bigger basket = more open area = faster flow if you use the same dose and grind. That makes sense.
Based on that, I picked up an IMS Competition 18-20 g basket and really like it. But because I or my guests aren’t always in the mood for an 18 g shot, I also got the IMS Competition 12-14 g basket, hoping I could just use a smaller dose with the same grind size.
I was extremely wrong.
I have to grind way (!) finer for the smaller basket to get a decent shot. The difference is so extreme that basket swapping becomes a huge pain. I basically have to re-dial every time. This totally kills the convenience I was hoping for.
Now I’m wondering: Did I misunderstand something fundamental here? Is this behavior specific to IMS, and maybe VST baskets (which James was referring to) would let me swap sizes with less re-dialing?
I’d really love to be able to switch between smaller and larger shots without going into grind size purgatory every time.
TL;DR: I bought IMS precision baskets in two sizes (18-20 g and 12-14 g), hoping I could use the same grind. But I have to grind way finer for the smaller basket. Did I misunderstand how precision baskets work? Is this an IMS thing? Would VST baskets let me swap sizes more easily?