Bushings

Whidden Gunworks bushings start out as prehardened tool steel bar stock. They are CNC lathe turned to size, bored, and the entry point is radiused. We then run an additional process to clean up and radius the back side of the bushing. 

Our bushing come in both Standard and Large sizes. The Standard bushing will work for a wide range of calibers from .20 to .338. The Large bushing is for use in our 1.25″ and 1.5″ dies.

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What Bushing is correct for my Whidden Bushing Die?

Measure the neck diameter of a loaded round that you’ve produced with the brass & bullets you plan to use. Subtract .002” from the diameter you measure to select the bushing size.

NOTE: Measuring several loaded rounds and using the average is advisable.

AS AN EXAMPLE: the loaded rounds measure on average .270” at the neck.

.270” – .002” = .268”

For this example, a .268” Bushing would be a good starting point to obtain about .001” neck tension. Obviously to obtain more neck tension a smaller size bushing would be needed.

Should my bushing be the same size as the neck of my rifle's chamber?
NO. It is not advised. The bushing size is dependent on case neck thickness and bullet diameter, not the chamber of the rifle.
How do I install a Bushing in my Bushing Sizer Die?

Remove decapping assembly by unscrewing top plug on sizer and removing the entire assembly. Drop in the bushing (Make sure the arrow or V is pointing down in the die). Re-install the decapping assembly. NOTE: Do not over tighten top assembly plug. Allow the bushing to float as this floating action is key to prevent runout. Check the adjustment of decapping assembly to ensure decapping pin is protruding at proper length. Whidden Gunworks bushing dies will accept Whidden Gunworks, Redding and Wilson bushings.