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The Lyman 277 Expanding Button is a precision-machined component designed for reloaders working with .270 caliber rifle cartridges. Intended for use with compatible Lyman resizing dies, this expanding button ensures consistent and accurate case neck expansion, which is critical for proper bullet seating and overall cartridge performance. Ideal for both hobbyist and experienced reloaders, it supports reliable case preparation and contributes to improved ammunition uniformity.
Product Overview
Manufactured by Lyman, a trusted name in reloading equipment since 1878, the 277 Expanding Button is engineered for use with .270 caliber cases. Constructed from durable, wear-resistant steel, the button is designed to deliver uniform neck expansion while minimizing brass work-hardening and neck runout. Its precise diameter ensures that the case neck is expanded to the optimal dimension for bullet seating, reducing the risk of bullet deformation and enhancing overall accuracy. The button is compatible with Lyman resizing dies that accept interchangeable expanding buttons, making it a practical upgrade or replacement part for reloaders seeking consistent results.
Technical Specifications
Feature
Specification
Manufacturer
Lyman
Model
Lyman 277 Expanding Button
Caliber Compatibility
.270 caliber (typically .277" diameter bullets)
Material
Hardened steel
Intended Use
Case neck expansion during resizing
Compatible Dies
Lyman resizing dies with interchangeable expanding buttons
Finish
Polished
Installation
Threaded for secure fit in die stem
Product Category
Expanding Buttons & Decapping Pins
Country of Origin
USA
Packaged Contents
One expanding button
Further Product Details
This Lyman 277 Expanding Button is specifically tailored for reloaders working with .270 caliber rifle brass, such as .270 Winchester and similar cartridges. The button is intended as a direct replacement or spare for Lyman resizing dies that feature interchangeable expanding buttons, ensuring continued performance and adaptability in your reloading setup. Installation is straightforward, requiring only basic tools to remove the existing button and thread in the replacement. Routine cleaning and occasional lubrication are recommended to maintain smooth operation and prevent residue buildup, especially when working with high volumes of brass.
As with all reloading components, users should ensure compatibility with their specific die model before purchase. In South Africa, no special licensing is required for reloading accessories such as expanding buttons, but all reloading activities should comply with local safety and legal guidelines. Lyman stands behind its products with a reputation for quality and precision, and support is available for technical queries or replacement needs. This expanding button is an essential component for reloaders seeking precise neck expansion and consistent bullet seating in their .270 caliber cartridges.
