Neck Sizing Bushing
By selecting the correct bushing, you are now able to provide just the right amount of neck tension to properly hold the bullet without excessive resizing. Heat treated steel. The sizing diameters are hand-polished with a surface hardness of Rc 60-62 to reduce sizing effort.
Item No. 73185 thru 73368 (specify size) - Heat treated steel as above with the addition of a Titanium Nitride surface treatment to further increase the effective surface hardness and reduce sizing friction. Item No. 76185 thru 76368 (specify size).
The proper bushing size can be easily determined by measuring the outside neck diameter of your loaded cartridge with a precision micrometer. From this measurement , subtract .001"
This allows for brass spring back after sizing and will result in a proper fit for the bullet.