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This is Hornady's .259" Match Grade bushing, built for 6mm cartridges and made to drop right into their Match Grade bushing-style neck and full-length sizing dies. It's a small part that punches well above its weight when it comes to ammo consistency. By swapping bushings, you control exactly how much your case neck gets squeezed down, which means you dial in neck tension to match your brass and your load rather than settling for whatever a standard sizer gives you.
The real trick here is the self-centering design. As the case moves into the die, the bushing floats and aligns to the neck instead of forcing it into position. That keeps you from over-sizing the neck or working the brass harder than it needs, which is what leads to short case life and inconsistent bullet pull. Less working of the brass also means more reloads out of the same cases, something the precision crowd pays close attention to.
Bushing selection comes down to your loaded neck outside diameter and the neck tension you're after. A good starting point is to measure a loaded round's neck OD and subtract a thousandth or two for proper grip. Hornady offers these in tight increments across the 6mm range, so if .259" runs a touch loose or tight for your particular brass, there's a neighboring size to fine-tune it. Thinner brass necks generally call for a smaller bushing, thicker necks a larger one.
This bushing is designed for Hornady's Match Grade bushing dies and installs with the knurled spindle lock, so changing sizes takes seconds without any tools or fuss. Whether you're running a dedicated neck sizing die or a full-length die that bumps the shoulder and sizes the neck in one stroke, the bushing handles the neck portion. It's made in the USA and sold as a single bushing, so you can build out a set in the sizes that match your loads over time.
It's made for Hornady's Match Grade bushing-style sizing dies, both the neck sizing die and the full-length version. The bushing drops into the die and locks in place with the knurled spindle lock, so no tools are needed to swap sizes. It won't fit standard non-bushing dies.
Measure the outside diameter of the neck on a loaded round, then subtract one to two thousandths for proper neck tension. If that number lands right around .259", this is your bushing. Keep in mind that neck thickness varies between brass brands, so it's worth measuring your specific cases.
A bushing lets you control exactly how much the case neck gets sized down, which dials in your neck tension instead of leaving it fixed. The self-centering design also avoids over-working the brass, so your cases last longer and your ammo runs more consistent. That consistency is what helps shrink groups downrange.
This is a single .259" bushing. Many reloaders build up a small collection of neighboring sizes over time to fine-tune neck tension for different brass and loads. You can add the sizes you need one at a time.
| UPC | 090255592597 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 594259 |
| Shipping Weight | 0.25 |
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