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Breville machines (Barista Express, Barista Pro, Bambino Plus) use a 54mm filter basket, so you need a 54mm tamper. The Breville Oracle uses a 58mm basket. Using the correct size is important — a tamper that's too small leaves a gap around the edge of the puck, allowing water to channel around it rather than through it, resulting in uneven, bitter espresso.

The old rule of '30 pounds of pressure' has largely been replaced by a simpler guideline: tamp firmly and consistently until the grounds stop compressing, then give a slight twist to polish the surface. Consistency matters far more than a specific number. A calibrated tamper (which clicks at a set pressure) is an excellent tool for building consistent technique, especially for newer home baristas.

A calibrated tamper has a spring mechanism that 'clicks' at a pre-set pressure (usually 10-15kg), ensuring you tamp to the same pressure every time. For home baristas who are still dialling in their technique, a calibrated tamper removes one variable from the espresso equation. Once you've developed consistent technique, a standard tamper works just as well.

A flat tamper base distributes pressure evenly across the entire puck surface — this is the most common style and what most baristas use. A convex base applies slightly more pressure in the centre than at the edges. We recommend flat base tampers for most home baristas as they are more forgiving and easier to use consistently.

Yes — using a coffee distributor (also called a leveller) before tamping is considered best practice. The distributor breaks up clumps and evenly levels the grounds in the basket before you tamp, which leads to a more even, consistent extraction. Using both tools is one of the most effective ways to eliminate channelling and improve shot quality. We offer tamper and distributor bundles for a complete puck prep kit.