Availability: In Stock
The RCBS 9550 Universal Primer Arm-2 handles both small and large primers, making it a practical choice if you're loading multiple cartridge types on the same press. Swapping between primer sizes takes less than 60 seconds—just change the plugs and sleeves that come in the kit—so you're not fumbling with tools or losing momentum at the bench. It's built to fit Rock Chucker II, JR, Reloader Special, and most C-frame presses, giving you broad compatibility across the popular RCBS press lineup.
If you're already running one of those presses and want to avoid buying a dedicated primer arm for each caliber family you reload, this dual-size setup cuts down on bench clutter and changeover time. It's straightforward reloading infrastructure—no fancy engineering, just a component that does what it's supposed to do so you can focus on the rest of your process.
Not compatible with RC Supreme presses, so verify your press model before ordering. The arm seats primers consistently across rifle and pistol cartridges, supporting the precision that accurate handloading demands.
| Manufacturer | RCBS |
| Model | 9550 Universal Primer Arm-2 |
| Primer Sizes | Small and large rifle and pistol primers |
| Compatible Presses | Rock Chucker II, JR, Reloader Special, most C-frame presses |
| Not Compatible With | RC Supreme |
| Included | Primer plugs and sleeves for small and large primers |
The 9550 works with Rock Chucker II, JR, Reloader Special, and most C-frame presses. It is not compatible with RC Supreme presses. If you're unsure about your press model, check the manual or the press nameplate before ordering.
No. This single arm handles both small and large rifle and pistol primers. You swap between them by changing the plugs and sleeves, which are included and take less than 60 seconds to swap out.
The kit includes the primer arm, plugs, and sleeves for seating both small and large primers.



SKU: 115675954 • Width: 3.5in • Height: 3in • Depth: 6.9in • Weight: 0.06oz