RCBS Pro Chucker Priming System Update

I’ve been working with RCBS on some issues related to the priming system on the RCBS Pro Chucker (5 and 7) for a while now addressing issues where the primer slider can break. Today, I’m happy to announce that RCBS has replacement primer sliders available for all Pro Chucker owners that will address these issues!

Here’s the full story with a description of the issue, how to fix your primer slider, and how to avoid priming system issues on the RCBS Pro Chucker presses:

As mentioned in the video, RCBS has made two updates to the primer sliders- here’s a side by side view of the old style (original) on the left, next to the updated style on the right:

rcbs-pro-chucker-primer-sliders-old-new

There are two key changes to note here:

  1. The area where the “post” joins up with the main body of the slider has been strengthened significantly (via stress reduction cutouts)
  2. The area of the primer slider where the hole is located is “stepped down” to avoid primers getting bound when dispensing a primer from the primer drop tube

Here’s a closeup showing the “step down” feature on the updated primer sliders (this is a prototype, shipping units will have a different texture on the step down):

rcbs-pro-chucker-primer-slider-new

If you need to replace your primer slider, you can do so without unloading reloading stations or emptying the primer drop tube. Here’s the process I show in the video above:

  1. Remove the primer slider return spring
  2. Remove the rear guard (remove allen screw)
  3. Remove the primer drop tube assembly (remove allen screw, pivot, catch primers with finger, lift off)
  4. With the ram raised slightly (moves primer punch out of the way) remove primer slider
  5. With the ram raised slightly, slide new slider into place
  6. Replace the primer drop tube assembly
  7. Replace the rear guard
  8. Put spring back in position (on primer slider vertical post)

That’s it! It’s a part of the same process you follow when changing the press over from large to small primers and vice versa.If you need to get new primer sliders for your RCBS Pro Chucker 5 or 7 press, all you have to do is email or call!

Here’s the info:

  • RCBS Tech Support email (can issue replacement parts): rcbs.tech@vistaoutdoor.com
  • RCBS Tech Hotline: 800-379-1732

I hope that’s helpful to all of you Pro Chucker loaders out there! I’ve been using the updated sliders with good success. See you all- I’m back to loading!

-Gavin

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10 thoughts on “RCBS Pro Chucker Priming System Update”

  1. Even with these new and improved slides, I have snapped off the tab twice through only about 300 rounds. Really pathetic, in my estimation.

  2. does RCBS sell it separatly ? or I have to wait to have a problem with it, to ask them for it ? Becuse I search it in the web and I didn’t find it. Thanks

  3. Before you use the primer feed , chamfer out the plastic hole for the primer feed bars. Put a good chamfer on both sides of the plastic hole . The hole RCBS has in it is a little to tight causing the primer to hang up during delivery snapping the plastic post off . Useng a case neck chamfer tool works well. . RCBS also has a replacement spring with less tension they will send you…….
    The indexer dog gets snapped off easily………..
    You will have to reset of corse all your dies if your switching from one type of progressive press to this one. In doing so the spent primer removing pin in you resizing die needs to be adjusted as well . RCBS says in the die instructions to have the pin 3/16 below the bottom of the resizing die. The prochucker 5 requires at least 5/16. Below the die to push the spent primer past the shell plate. This will stop the spent primer from getting wedged in between the shell plate and the press.
    It should stop the indexing dog from getting snapped off..I also changed the indexing locking pin to a longer one I made from a rcbs pro 2000 press it has a longer more pointed taper.( RCBS sent me the part so I could modify it) It seems to force the shell plate in place better than the factory one on the press (although I need to try and compare it some more ) My new issue is a lot of high primers (I think the primer pusher has dented the softer aluminum base of the press) I have temporarily put a .005 shim stock there and taped in in place . Seems to have stopped the high primers..

    1. Thanks for detailing the issue with the primer slider. I replaced my RCBS Pro 2000 with a Pro Chucker 7 and am frustrated with the primer sliders breaking @ every 300 rounds of reloading. RCBS Tech Support are very nice, however, it takes at least a week for spare parts to arrive. They need to be more like Lee and have parts for this press readily available for on line ordering. It would also be great if they provided the tips you did!

  4. I am also a bit disappointed with their bullet and case feeder solutions. Either you feed @ 10-15 cases through a single tube or purchase the more expensive motorized feeder similar to what Hornady used with their Ammo Plant. I have adopted the top portion of the Lee case feeder to the RCBS unit and use a Hornady bullet feeder die with a Bully Adapter and Lee bullet feeder multi tube setup. Both work great! Now if the Primer Slider issue gets solved this will be my ultimate reloading press!

  5. To all RCBS Pro Chucker 5/7 owners, would you recommend waiting until a proven fix is available before purchasing a reloader?

  6. Yes Wait, I have found this primer system the most frustrating. I have worked through the other issues but can’t get past this one, I am constantly waiting on replacement bars to reload. In the end i became so frustrated i went back to my Lee 4 hole turret press. The main issue is not being addressed, the week spot on the bar is the plastic tab. this need to be metal so that when you feel it getting hung up you can stop. with the plastic, by the time you feel the issues its snapped off.

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