Hornady Lock-N-Load 300 Rem SAUM Modified Case

• Calibre-specific modified case for 300 Remington Short Action Ultra Magnum
• Designed for use with the Hornady Lock-N-Load O.A.L. Gauge system
• Drilled and tapped base accepts the gauge's bullet comparator insert
• Determines cartridge overall length to the rifling lands in your own rifle chamber
• Manufactured to SAAMI specifications for the 300 Rem SAUM
• Reusable tool — no primer or powder charge required

The Hornady Lock-N-Load Modified Case for 300 Remington Short Action Ultra Magnum is a dedicated reloading tool for use with the Hornady Lock-N-Load O.A.L. Gauge. Manufactured to SAAMI specifications for the 300 Rem SAUM chamber, the case is drilled and tapped at the base to accept the O.A.L. Gauge's bullet comparator insert. This combination allows handloaders to establish the precise cartridge overall length at which a chosen bullet contacts the rifling lands in their own rifle — a measurement that varies from barrel to barrel and is critical for setting an accurate and safe seating depth. Knowing the lands-to-base distance in your specific chamber means you can seat bullets to a defined jump rather than relying on generic published data. No live round is needed; the modified case chambers freely, captures the bullet at the lands, and allows the gauge to record the true COAL. A compact, reusable tool that belongs in any 300 SAUM handloader's kit.

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