Will the Hornady A375 modified case work with my .375 Ruger or .375 Winchester rifle?

No, the Hornady A375 is strictly engineered to SAAMI specifications for the .375 Holland & Holland (.375 H&H) Magnum calibre only. It is incompatible with other .375-calibre variants such as the .375 Ruger, .375 Winchester, or .375 Blaser. For non-standard or fire-formed custom chambers, Hornady recommends using their Custom Modified Case Service instead.

What equipment do I need to use the Hornady A375 modified case effectively?

This modified case is designed to thread directly onto the Hornady Lock-N-Load Overall Length (O.A.L.) Gauge, which is available in both Straight (model #C1000) and Curved (model #C1550) versions. The case mouth is reamed 0.002 inches oversized so that a standard .375 calibre bullet slips in and out smoothly and concentrically without resistance during your measurements.

Does this reloading tool require any special permits or Australian electrical compliance?

No permits or electrical compliance are required. The Hornady A375 is an entirely mechanical, non-electrical hand-tool accessory containing no live primers or gunpowder, meaning it is classified as non-regulated reloading hardware and is freely shippable across all Australian states and territories.

Modified Case - Hornady A375

The Hornady Lock-N-Load® Modified Case – .375 H&H Magnum (Model A375) is a specialised reloading tool designed to measure the exact distance to a rifle's rifling lands. Manufactured from factory brass to SAAMI chamber specifications, this modified case works directly with Hornady Lock-N-Load® Overall Length (O.A.L.) Gauges to determine true bullet jump. By allowing handloaders to identify the exact point of bullet contact with the lands, it enables seating depth adjustments down to ±0.001" for optimal consistency and accuracy in .375 Holland & Holland Magnum rifles.

Key Features

Precision Threaded Base: Features a fine-threaded flash hole cut squarely into the case head to securely attach to Hornady O.A.L. Gauge tools.
Reamed Neck Clearance: The case neck is expanded by .002" oversized, enabling standard .375-calibre projectiles to slide smoothly and concentrically without friction during measurement.
SAAMI Dimension Standard: Formed to standard .375 H&H Magnum cartridge dimensions to ensure reliable fitment in factory SAAMI-spec chambers.
Gauge Compatibility: Designed for seamless integration with both the Hornady Straight (#C1000) and Curved (#C1550) Lock-N-Load O.A.L. Gauges.

Product Specifications

Brand: Hornady
Model Number: A375
Calibre: .375 Holland & Holland (.375 H&H) Magnum
Material: Factory brass
Neck Modification: .002" oversized internal neck diameter
Packaged Weight: Approximately 22.7 g (0.05 lbs)
Packaged Dimensions: Approximately 14.6 cm × 5.1 cm × 1.9 cm
Tool Compatibility: Hornady Lock-N-Load O.A.L. Gauge Straight (#C1000) and Curved (#C1550)

Who is the Hornady Lock-N-Load Modified Case for .375 H&H Magnum for?

Handloaders tuning ammunition for .375 H&H Magnum rifles — who require a specialised reloading modified case manufactured specifically to .375 Holland & Holland Magnum chamber dimensions to screw squarely onto an O.A.L. gauge tool.
Precision reloaders measuring bullet jump — who need a case neck expanded by .002" oversized to allow free, concentric movement of .375-calibre projectiles when finding the exact chamber rifling contact point.

Less suitable for: Firearm chambers chambered in alternate .375-calibre variants such as .375 Ruger, .375 Winchester, or .375 Blaser, or tight custom wildcat chambers that do not conform to standard SAAMI factory brass dimensions (which require a custom-machined fire-formed modified case service).

SKU	HN102497LP
Model #	A375
Brand	Hornady
Shipping Weight	0.0100kg

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Hornady A375 Lock N Load Modified Case 375 H&H Magnum

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