Will the Hornady 050019 Primer Arm Comp fit my modern Hornady Lock-N-Load Classic or Iron press?

No, this component is engineered strictly for legacy Hornady and Pacific 00-7 single-stage presses. It is incompatible with modern Hornady Lock-N-Load Classic or Iron presses, which utilize entirely different priming mechanisms.

Does this priming arm handle both small and large primers?

Yes, the assembly includes interchangeable small (.175) and large (.210) primer seating cups and punches. It seats one Boxer-primed centerfire primer per ram stroke, though it cannot accommodate Berdan cases or massive .50 BMG cartridges.

Does this reloading accessory require any electrical approvals or Australian plugs for use in my workshop?

No electrical approvals, 240V power, or SAA/RCM certifications are required. The Hornady 050019 is a purely mechanical, all-steel reloading spare part that operates entirely manually without electricity.

What maintenance is required to ensure the longevity of the all-steel construction?

Because it is crafted from all-steel, it is best kept in an indoor workshop environment and maintained with a light coat of rust-inhibiting gun oil or lubricant. This prevents any corrosion over long periods of low-to-moderate volume reloading storage.

Primer Arm Assembly - Hornady 050019

The Hornady 00-7 Primer Arm Comp (MPN: 050019) is an OEM all-steel replacement priming arm assembly engineered specifically for the legacy Hornady and Pacific 00-7 single-stage reloading presses. Designed to restore on-press priming functionality, this mechanical arm slots directly into the ram cut-out and pivot geometry of the 00-7 press frame. As the press ram lowers, the arm swings into alignment beneath the shell holder to seat a primer flush into a resized centerfire cartridge case. It operates as a fully manual mechanical component requiring no electrical power, and it can be run either by hand-feeding individual primers into the seating cup or by pairing it with an original 00-7 automatic primer feed tube assembly.

Key Features

All-Steel Construction: Manufactured entirely from steel to withstand repeated mechanical seating pressure during single-stage reloading operations.
Interchangeable Seating Punches: Includes dedicated assemblies for both Small (.175") and Large (.210") primer seating cups, punches, and internal return springs/plungers.
Direct OEM Fitment: Machined specifically to match the factory pivot slots and ram clearances of the discontinued Hornady/Pacific 00-7 press frame.
Single-Stroke Cycle: Seats 1 primer per ram stroke directly during the case preparation and sizing cycle on the press.
Manual or Tube-Fed Operation: Functions as a standalone manual single-feed arm or integrates with vintage 00-7 auto-feed tube mechanisms.

Product Specifications

Manufacturer Part Number (MPN): 050019
Material: Steel
Unit Weight: Approximately 0.2 to 0.45 kg (~1 lb shipping weight)
Compatible Press Model: Hornady/Pacific 00-7 single-stage reloading press
Primer Size Compatibility: Standard Small (.175-inch) and Large (.210-inch) Boxer primers (rifle and pistol)
Cycle Capacity: 1 primer per ram stroke
Power Requirements: Manual mechanical operation

Who is the Hornady 00-7 Primer Arm Comp for?

Legacy Hornady and Pacific 00-7 Press Owners — requires factory-fit replacement parts to restore on-ram priming of Boxer-primed metallic rifle and pistol cases using interchangeable small (.175") and large (.210") seating punches without retiring the press.

Less suitable for: Owners of modern presses such as the Hornady Lock-N-Load Iron or Classic (which require flat swing-arm assemblies), reloaders processing oversized .50 BMG cartridges using .315" primers or Berdan-primed brass, or high-volume reloaders who require progressive presses or dedicated bench-mounted priming tools to exceed single-stage cycling rates of 1 primer per ram stroke.

SKU	HN42647LP
Model #	050019
Brand	Hornady
Shipping Weight	1.0000kg

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Hornady 050019 00-7 Primer Arm Comp Steel Replacement

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