The RCBS 9581 Auto Primer Feed Tube is a large-format primer tube designed to work with RCBS single-stage presses—specifically the Rock Chucker, JR, and Reloader Special models. If you're hand-loading rifle or pistol ammunition and tired of seating primers one at a time, this feed tube automates the process, letting you focus on other steps in your reloading sequence. It's a straightforward upgrade that eliminates fumbling with loose primers and the accidental oil contamination that comes from handling them by hand.

Built from aluminum for durability and reliability, the tube holds up to 100 large primers and integrates directly into your press's primer arm. Once loaded, primers feed smoothly into the seating position with each stroke, dramatically speeding up production without sacrificing safety or consistency. Whether you're prepping ammo for hunting season, competition, or long-range work, a primer feed tube removes one of the most tedious parts of the reloading cycle.

This is the tube component only—designed as part of RCBS's automatic primer feed system for their standard presses. If you already own a compatible Rock Chucker, JR, or Reloader Special, the feed tube bolts on easily and requires no additional tooling.

Key Features

• Large primer capacity—holds up to 100 primers per load
• Aluminum construction for durability and reliability
• Compatible with RCBS Rock Chucker, JR, and Reloader Special single-stage presses
• Eliminates manual primer handling, reducing contamination and speeding workflow
• Simple press-mounted design

Specifications

Product	RCBS 9581 Auto Primer Feed Tube 1
Brand	RCBS
Primer Size	Large
Material	Aluminum
Primer Capacity	Up to 100 primers
Compatible Presses	Rock Chucker, JR, Reloader Special

Frequently Asked Questions

Will this primer feed tube fit my RCBS press?

The RCBS 9581 is designed for Rock Chucker, JR, and Reloader Special single-stage presses. Confirm your press model matches one of these before ordering.

Can I use this with small primers?

This is the large primer feed tube. RCBS makes a separate small primer version; make sure you have the correct size for your application.

How many primers does it hold?

The tube holds up to 100 large primers per fill, reducing the need to stop and reload the feed tube during a reloading session.

Is this just the tube, or does it come with the full system?

This is the tube component only. It is part of RCBS's automatic primer feed system and is designed to integrate with a compatible press.