Rollsizer machines are reloading machines made in Australia by the company Rollsizer. They are designed to resize and shape the case of a fired cartridge to the desired size and shape, they also have the ability to resize the case neck and the case shoulder.

Rollsizer machines are used to resize the case of a fired cartridge to the desired size and shape, they also have the ability to resize the case neck and the case shoulder. The machines work by using a set of rollers which are adjusted to the desired size and shape, the case is then passed through the rollers which resize and shape the case to the desired size and shape.

The machines are designed to be very accurate, efficient and easy to use, they are also designed to handle a wide range of cartridges and can be easily configured to resize different calibers.

The Rollsizer machines are considered to be among the best in the market for case resizing and they are used by competitive shooters, high-volume reloaders, and commercial reloaders. They are also used by gunsmiths and other professionals in the firearms industry.