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Dillon 550 primer help

This is a discussion on Dillon 550 primer help within the Ammo and Reloading forums, part of the Gun Forum category; I picked up a 550 about a year ago and am loving it! Have been using it to load 9mm and 357 SIG since, all ...


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Old 12-30-2016, 07:24 AM   #1
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Dillon 550 primer help

I picked up a 550 about a year ago and am loving it! Have been using it to load 9mm and 357 SIG since, all small primers, with no problems. Last night, I started loading some 10mm, had some new, factory primed cases, and got them all loaded up. This morning, I'm trying to set the primer system to feed large primers and am experiencing the large primers just falling through.

In these pictures, I have removed the primer system from the press and am looking inside the primer housing and shield (#20263).

Here, I have the large and small primer magazines side by side. Notice the difference between the flexible orifice large - red (#14003) and flexible orifice small - blue (#14024). The small appears to have a shroud around the primers extending into the primer housing cavities, helping to retain the primers against the primer feed stop pin (#14051). The large merely has a point that comes up to the primer feed stop pin with nothing to retain the primers as they drop out of the magazine tube.



In this picture, I have the small primer magazine installed, notice how the flexible orifice small extends into the primer housing cavity, all the way to the primer feed stop pin.



Here is the large primer magazine, notice the free space between the primer feed stop pin and the end of the flexible orifice large, which I believe is the root of my problem, allowing the primers to fall out freely.



Those of you with the 550, do your flexible orifices, particularly the large red, look the same as in my pictures? I am playing around with the slide pickup adjustment screw (#13961), making certain the primer seating cup, large (#13824) is concentric with the primer magazine opening in the primer housing.

Any other suggestions you can make here?


Thanks for any suggestions in advance!
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Old 12-30-2016, 09:11 AM   #2
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Your plastic piece is broken. You will need to replace it.
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Old 12-30-2016, 09:24 AM   #3
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Thanks, Amp! I'm stopping by my dealer later today with the part. Thing is, I removed this large primer magazine when I purchased the press and have only used the small primer magazine. I store all my extra reloading press parts in a plastic storage container. There are no broken nubs inside the box, I'm pretty certain this is how I received the red large magazine. Also, upon closer inspection, it doesn't appear the edges are fractured where one would expect it to be broken, it appears to be molded that way.

Regardless, glad to know the part isn't correct. Thanks again!
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Old 12-30-2016, 09:31 AM   #4
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grabbed a quick pic, 1 small 1 large.
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File Type: jpg s-l1600.jpg (51.9 KB, 8 views)
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Old 12-30-2016, 09:34 AM   #5
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Thanx, Curmudgeon!!
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Old 12-30-2016, 02:11 PM   #6
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Originally Posted by Major Tom View Post
Thanks, Amp! I'm stopping by my dealer later today with the part. Thing is, I removed this large primer magazine when I purchased the press and have only used the small primer magazine. I store all my extra reloading press parts in a plastic storage container. There are no broken nubs inside the box, I'm pretty certain this is how I received the red large magazine. Also, upon closer inspection, it doesn't appear the edges are fractured where one would expect it to be broken, it appears to be molded that way.

Regardless, glad to know the part isn't correct. Thanks again!
I used a Square Deal press for many years. Dillon is excellent with customer service and will surely replace any broken items. Call or email them.

The 550 appears to use the same primer feed system. Good products all around.
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Old 12-30-2016, 02:34 PM   #7
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Agreed, very happy with the Dillon, glad I bought it. Used an RCBS progressive for several years, nice but not a Dillon. I do my reloading for the year while the weather is cold and spend that time on the water when warm, shooting year round. I picked up a couple thousand factory new Winchester 10mm cases, half primed, half not. Got the primed cases loaded last night, not a hitch. With the RCBS, I would have had to make adjustments to the equipment three or four times.

Wanted to visit my dealer and wish him a happy holiday, anyway. He had the parts and spares in stock. Also picked up a couple tool heads, powder funnels and powder dies so I can get going on 300 blk and .223/5.56. I'll finish the 10mm, run 3,000 45's, then do a bunch of the small rifles and go back to the small pistol primer business.

On the upside, with all my struggles trying to get the large primers to run this morning, I learned a whole lot about how the Dillon operates.

Thanks again for your help!
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Old 01-02-2017, 05:16 AM   #8
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Dillon really stands behind their equipment.
I got my 550 with a lot of accessories used at a great price.

I found the bearing under the primer arm was worn.
I had no idea how worn. I called for advice, and the rep said there should be no real wear on that plate, they call a bearing.
I think the guy sold it, because he couldn't get primers going right.

He knew I just bought it used. He said that should not happen, and mailed me 3 of them.

I don't know why, but my 550 had 3 drop tubes of each, and a package of 4 of each caps.
If you dealer doesn't have any, just call Dillon.

Last resort, I have some spares, and can mail you one.
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Old 01-02-2017, 10:29 AM   #9
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For whatever reason almost every time I switch from L to small or back the plastic needs to be replaced or will not function. Dillon sent me like 5 of each and just said call when I get low and they will send more.

I did a complete rebuild of my SQDB. They sent all the parts and coached me over the phone.
Just great CS

I always freak them out by giving them my customer ID# right away. No one ever does that
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Old 01-02-2017, 10:53 AM   #10
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Originally Posted by Wulfmann View Post
For whatever reason almost every time I switch from L to small or back the plastic needs to be replaced or will not function. Dillon sent me like 5 of each and just said call when I get low and they will send more.

I did a complete rebuild of my SQDB. They sent all the parts and coached me over the phone.
Just great CS

I always freak them out by giving them my customer ID# right away. No one ever does that
That's too weird, I go back and forth on my 550 on a regular basis with no issues. Gotta be a simple reason it's going on? I have personally found that any time something wasn't right with my Dillon, it was user error on my part. It's really a nice loading system. Looks like your getting first class support from Dillon.
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