- Purpose-made modified case for use with the Hornady Lock-N-Load O.A.L. Gauge
- Chambers in any .257 Weatherby Magnum rifle to measure the true cartridge overall length to the lands
- Manufactured to SAAMI specifications for correct fit in .257 Wby Mag chambers
- Drilled and tapped to accept the O.A.L. Gauge bullet-holding assembly
- Particularly useful in the .257 Wby Mag, where freebore depth affects seating depth choices
- Repeatable datum point for precision load development in this fast Weatherby calibre
The Hornady Lock-N-Load Modified Case for .257 Weatherby Magnum is a dedicated reloading tool for use with the Hornady Lock-N-Load O.A.L. Gauge. A modified case is a factory cartridge case that has been drilled and tapped to accept the gauge's bullet-holding stem; it fits into the .257 Wby Mag chamber of your rifle and lets you measure the exact distance from the bolt face to the rifling lands — the true overall length for that specific barrel. The .257 Weatherby Magnum has a distinctive double-radius freebore that can make seating depth work particularly important; knowing where the lands are relative to your seating die setting allows you to approach the rifling to a precise and repeatable degree. Hornady manufactures this case to SAAMI specifications, ensuring a correct fit. Suitable for handloaders working with this fast, flat-shooting Weatherby calibre for long-range hunting or precision target work, the modified case is the starting point for seating-depth experiments and load development.
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