Gamo Expander 5.5mm / .22 Cal

Gamo Expander 5.5mm / .22 Cal Hollow Point Pellets

The Gamo Expander 5.5mm / .22 Cal is a hollow-point airgun pellet designed around one defining characteristic: controlled expansion on impact. Each Gamo Expander 5.5mm pellet weighs 1.00 g (15.42 gr) and the tin contains 250 pellets. Gamo’s own product description states that the specially designed hollow-point configuration is intended to maximise impact and expansion, producing a characteristic mushroom effect on impact.

This makes the Expander distinctly different from conventional round-head or flat-head pellet designs. Its hollow point is the key feature for shooters selecting a .22 calibre pellet specifically for expansion characteristics.

Hollow-Point Design

The Gamo Expander uses a hollow-point head, with the recessed nose designed to deform on impact. Gamo describes this configuration as producing a “mushroom effect” and specifically markets the pellet around its impact and expansion characteristics.

The hollow-point configuration is therefore not simply a visual feature; it is the defining design element of the Expander range.

5.5mm / .22 Calibre

These pellets are manufactured in 5.5mm (.22 calibre) for compatible airguns.

Before use, check that your air rifle or air pistol is designed for 5.5mm / .22 calibre pellets and that its manufacturer permits the use of this pellet type.

1.00 g / 15.42 gr Weight

Each Gamo Expander 5.5mm pellet has a specified weight of 1.00 g (15.42 grains). This gives customers an important reference when comparing the Expander with other .22 calibre pellet designs.

Pellet performance can vary between different airguns, so the specified weight should be considered alongside the requirements and recommendations for your particular airgun.

Intended for Impact and Expansion

Gamo positions the Expander specifically around impact and expansion, with the hollow-point design intended to produce a mushroom effect when the pellet strikes its target.

For customers comparing .22 calibre pellet types, this makes the Expander a different proposition from traditional domed pellets, where the head shape and design priorities are different.

The suitability of any pellet for a particular application depends on the airgun, its specifications and the applicable laws and regulations. Always use the pellet type recommended for your airgun.

250 Pellets per Tin

Each tin contains 250 Gamo Expander pellets, providing a substantial supply for repeated shooting sessions. Gamo’s current catalogue lists the 5.5mm Expander at 250 pellets per tin with a 1.00 g / 15.42 gr pellet weight.

Product Specifications

What Makes the Gamo Expander Different?

The defining feature of the Gamo Expander 5.5mm is its hollow-point head. Rather than using a solid domed or flat head, the Expander is specifically designed around impact and expansion, with Gamo describing the resulting deformation as a mushroom effect.

For customers choosing between different .22 pellet designs, the Expander is therefore most readily identified by its hollow-point configuration, 1.00 g / 15.42 gr weight and 250-pellet tin.

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