I usually make espresso and lattes on a Breville Barista Express, using its built-in grinder. The part I care about most is consistency: weigh the coffee, prepare it in a repeatable way, and give yourself a useful starting point for the next shot.

Tamping is the most difficult part for me. People say to apply a particular number of pounds of pressure, and I have an immediate question: how am I supposed to know what that feels like?

The tools in my setup

Alongside the Barista Express, I have a Normcore spring-loaded tamper, a WDT tool, and a small Bomber coffee scale. Those are the tools I use; you can take the underlying idea—make the steps easier to repeat—and apply it to your own equipment.

I start by weighing the coffee

My usual starting dose is 18 grams. Depending on the basket, I may try 19 grams and see what tastes best. The basket is the insert inside the portafilter that holds the grounds; its capacity matters when choosing a dose.

For context, Breville's US Barista Express manual lists approximately 16–19 grams for the supplied two-cup baskets. That capacity refers to those baskets. Check the instructions for the basket you use when choosing a dose.

Weighing is the important starting step for me. If the amount of coffee changes while I'm also adjusting something else, it becomes harder to understand what made the difference. Choose an appropriate dose for your basket and keep it steady while comparing another adjustment.

If consistency is off, check what reaches the basket

Weighing the beans before grinding does not necessarily tell you exactly how much ground coffee reaches the basket. Some grounds can remain in the grinder or chute. Fellow's dialing-in guide identifies this as a useful check when shots vary.

I think checking the weight after grinding can be worthwhile if you're having consistency issues. As a practical check, zero the scale with the empty receiving container or portafilter on it, then weigh the grounds. It gives you another detail to investigate before changing everything.

What does “30 pounds of pressure” even mean?

The number is real advice, rather than something coffee people collectively imagined. Breville's tamping article discusses roughly 20–30 pounds of force. Its Barista Express manual gives about 22–33 pounds while emphasizing consistency.

Still, reading the number does not teach my hand to measure it. Barista Hustle offers a useful practical explanation: keep the tamp level and compress the grounds firmly until they stop noticeably moving downward. Continuing to push harder is unnecessary once that point is reached.

That puts the attention on a firm, level, repeatable tamp instead of treating one exact number as a magic ingredient.

Why I use a spring-loaded tamper

This is why the spring appeals to me. Normcore's explanation of its spring-loaded design describes using a spring to control the force. The precise operation depends on the model, so follow your own tamper's instructions.

I also have a WDT tool for distributing the grounds before tamping. WDT uses fine needles to help break up clumps and distribute coffee in the basket, as Breville's guide explains. It is another preparation step to keep repeatable.

A note about spraying the beans

I also use a light spray on beans before putting them in the built-in grinder. Spraying beans is often called the Ross droplet technique, or RDT. Its purpose is to reduce static buildup and grounds clinging to the grinder. It is not protection against an electrical fault.

Research on static charging during coffee grinding supports adding small amounts of water to reduce clumping and retention, but the experiments used an EK43 grinder. That does not establish compatibility with this Breville. Breville's manual lists moisture in the grinder chamber or chute as a possible reason no grounds come out. The starting checklist below leaves out spraying beans; compatibility with this machine's guidance has not been confirmed.

A simple starting checklist

  1. Weigh a dose appropriate for the basket.
  2. If results vary, check the grounds' weight after grinding.
  3. Distribute the grounds before tamping.
  4. Make a firm, level tamp using your tool's instructions.
  5. Change one variable at a time and compare the taste.

That is the idea behind my routine. Repeatability gives me a clearer comparison; the coffee still needs to taste good to me. There is room to experiment without guessing at every step.

Sources and further reading