Description
This carbide expanding mandrel is specifically sized and designed to use for necking 6mm brass up to 30cal, mostly for necking 6BR brass up to 30 cal for making 30BR. This mandrel does this job in one step rather than multiple steps.
The long gradual taper of this mandrel reduces the chances of splitting necks and the amount of work it takes to neck up 6mm brass and sizes it properly for neck turning. Be sure to lubricate the inside of the case neck and/or the mandrel.