- OAL Gauge accessory — measures bullet-to-lands distance in .50 BMG chambers
- Once-fired .50 BMG case drilled and threaded at the base to fit the Lock-N-Load OAL Gauge
- Inert measuring tool — not a loaded round, not for firing, no FAC required
- Chambering-specific: fits standard SAAMI-spec .50 BMG rifle chambers
- Supports precision reloaders seeking consistent seating depth in this large-calibre cartridge
- Reusable across multiple seating-depth measurement sessions
- Lock-N-Load OAL Gauge required and sold separately
The Hornady Lock-N-Load 50 BMG Modified Case is a chambering-specific reloading accessory for use with the Hornady Lock-N-Load OAL (Overall Length) Gauge, sold separately. It is a once-fired .50 BMG case that has been drilled and threaded at the base to screw onto the OAL Gauge body. The reloader seats a bullet of their choice in the open neck, then chambers the assembly in the rifle to measure the precise cartridge overall length at which the bullet contacts the rifling lands — establishing the key datum for optimum bullet seating depth in this large-calibre chambering. The .50 BMG is a cartridge widely used in long-range precision shooting and target disciplines where reloading consistency is critical. Manufactured to SAAMI specifications, the modified case is chambering-specific and fits standard .50 BMG rifle chambers. It is an inert, reusable measuring tool — not a loaded round, not intended for firing, and requiring no firearms certificate.
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