USED Redding Reloading .312in Titanium Nitride Neck Sizing Bushing. 256 .261 .262 .288 .307 .309 .311 and others. Regardless of the diameter chosen all of the sizing bushings used for reloading are made of steel that has been heat treated and have a titanium nitride treatment to increase the effective surface hardness. This also helps reduce friction associated with sizing. The bushings are made to cover calibers from .17 to .338 while providing the exact amount of neck tension needed to hold the bullet firmly in place but without causing excessive resizing. Specifications for Redding Reloading Titanium Nitride Neck Sizing Bushing: Manufacturer: Redding Reloading Quantity: 1 Color: Bronze Gun Type: Rifle Fabric/Material: Steel Features of Redding Reloading Titanium Nitride Neck Sizing Bushing: 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. Package Contents: Redding Reloading Titanium Nitride Neck Sizing Bushing Redding Reloading 76312: .312in Titanium Nitride Neck Sizing Bushing