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This is the .258" heat-treated steel neck sizing bushing from Redding, part number 73258. If you reload with a Redding Type S or Competition bushing-style die, this is the little piece of steel that actually does the work of sizing your case necks down to the exact diameter you want. One bushing, one size, and it's marked right on the face so you always know what you're grabbing.
The whole idea behind a bushing die is control. Instead of relying on a one-size-fits-all expander, you pick a bushing that sizes the outside of the neck to precisely where you want it. These are made from heat-treated steel and the sizing diameters are hand-polished to a surface hardness of Rc 60-62, which cuts down on sizing effort and leaves less drag on your brass. The .258 bushing itself shares the universal external dimensions of 1/2" outside diameter by 3/8" long, so it freely interchanges across all of Redding's bushing-style dies. One bushing can self-center on the case neck inside the die, and that floating action is a big part of why these setups produce such concentric ammo.
Getting your bushing size right is simple. Seat a bullet in a piece of your brass, measure the outside diameter of the loaded neck with a good caliper or micrometer, then subtract for the amount of neck tension you want. A lot of reloaders land somewhere between .001" and .003" of tension and run with it. Redding offers these in .001" increments across the full .185" to .368" range, so there's a size for just about everything from .17 up through .338 caliber. The .258 works for a range of cartridges depending on your brass thickness and the tension you're after.
Steel bushings like this one are a favorite among precision handloaders because they're smooth, durable, and hold their marked dimension well. Pair it with your Type S die and you've got a repeatable way to tune neck tension without overworking your brass.
It fits all of Redding's bushing-style dies, including the Type S neck sizing, Type S full length, and Competition sizer dies. Because these bushings share universal external dimensions of 1/2" OD by 3/8" long, they also work in most other popular brands of bushing dies. The die itself is sold separately.
Seat a bullet in a piece of your brass and measure the outside diameter of the loaded neck with a caliper or micrometer. Then subtract the amount of neck tension you want, commonly somewhere between .001" and .003". If that math lands you at .258", this is your bushing. Keep in mind neck wall thickness varies by brass brand, so measure your own cases.
Both are heat-treated steel with the same hand-polished Rc 60-62 surface hardness. The titanium nitride version adds a surface coating that further increases hardness and reduces friction while sizing. The plain steel bushing is a longtime favorite for precision handloading and many reloaders simply run a bit of case lube on the necks.
No, that's one of the main benefits of a bushing setup. The bushing sizes the outside of the neck directly, so many reloaders pull the expander out of their Type S die entirely. This cuts down on the brass working and helps keep your necks concentric.
| UPC | 611760732584 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 73258 |
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