The Hornady 398357 Lock-N-Load AP Progressive Press Replacement Small Primer Tube is an OEM factory magazine feed tube designed specifically for the on-press priming system of the Hornady Lock-N-Load AP progressive reloading press. Constructed from precision-extruded metal alloy, this replacement tube installs directly into the press-mounted blast shield housing to deliver continuous, jam-free feeding of small primers directly to the sub-plate slide shuttle. It operates as a passive mechanical component, holding up to 100 primers to match standard retail primer packaging quantities.

Key Features

• Factory OEM Fit: Engineered to exact factory tolerances to directly replace bent, worn, or burred magazine feed tubes without requiring press modifications.
• Dedicated Small Primer Operation: Sized specifically for standard small primer pocket diameters of approximately 0.175 inches (4.45 mm), preventing tipping and misfeeds during cycling.
• Full-Tray Capacity: Holds up to 100 small primers at a time, allowing high-volume handloaders to load a complete standard tray in a single operation.
• Rapid Priming Conversion: Enables straightforward caliber changeovers between large and small priming setups on the Lock-N-Load AP progressive press.

Specifications

• Brand: Hornady
• Model Number: 398357
• Product Category: Progressive press primer magazine feed tube
• Material: Precision-extruded aluminium / metal alloy
• Primer Size Compatibility: Small (Small Rifle / Small Pistol, ~0.175″ / 4.45 mm)
• Capacity: Up to 100 small primers
• Press Compatibility: Hornady Lock-N-Load AP Progressive Press priming housing
• Power Requirements: None (fully mechanical operation)

Who is the Hornady Lock-N-Load AP Replacement Small Primer Tube for?

• High-Volume Progressive Press Handloaders — Requires a factory-spec progressive press primer tube to restore smooth feeding of small rifle and small pistol primers in full batches of 100 primers on the Hornady Lock-N-Load AP press.

Less suitable for: Handloaders loading calibres that use Large Rifle or Large Pistol primers measuring 0.210 inches (5.33 mm), who require a dedicated large primer magazine feed tube.