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Two primers every time

I have the 550B which has worked great for the last three years, but now when using the small primer setup each time I cycle the handle it spits out two primers.  When I pull the handle down one primer goes into the cup as it should but when I raise the handle a second primer gets shot out.  I'm not sure how to fix this as it works fine with the large primer setup.

It sounds like the primer cup is not fully seated in the primer slide, or the magazine tube is not properly installed into the shield. There is a drawing in the front of the machine manual showing where to measure, and what the tolerances should be. For the magazine tube, the blue tip on the small magazine tube should almost touch the top of the white plastic primer retaining pin.

Hi there...just started having similar problems. The chute is sticking and some of the dead primer are just falling through but for some reason very often the new live primer is just getting tossed out of there also. I just cruised some of the blogs out there about cleaning the chute out, messing with the little cotter pin and carefully bending the walls of the chute out a little to clear the fixed section and a bunch of rather inventive solutions. I am about to at least try and get the chute to work smoothly but why is it tossing primers out all over the place? Sometimes they land on the primer feed piece, sometimes fly into the bin with the pent ones, sometimes just shoots then out of there into the blue storage bin with the loaded rounds or on the floor. I have been loading forever but only with a dillon 550 a for 8 months or so. Love em and this is the first real annoying issue I have had.

its 30 minutes after my post here. I thoroughly cleaned, well everything. The primer chute is working great but probably 75 % of the time now I am getting either no primers or 2 primers. I also put a brand new blue tip on the bottom of my primer tube and it has not helped a bit. What do I need to do to fix this? A complete new primer slide assembly? 

Mine is doing the same thing. Any answers out there?

I had primer problems from day one with my RL550. I tried everything I could think of and just dealt with it best I could. When I got into rifle loading for 223 I was using range brass and kept breaking de caping pins. I purchased a Lee universal de caping die because I found some after market hardened de capping pins out there but they only fit the Lee. I have not broken a pin after that and have processes over 3000 223 brass so far. I also at the same time purchased a wet tumbler to clean my 223 brass. It worked great and with the brass already de capped the primer pocket came out sparkling clean like new brass. I was having so many problems putting primers in 223 brass sometimes (not because of the Dillon press, because of some of the weird brass I was using) that I picked up a RCBS Universal hand primer, that was the best thing I ever purchased (except my 2 RL550's). Now I just prime my brass easily at my desk while I watch TV or YouTube, and priming is just part of my case prep. I do not have to stop every 100 to put more primers in and I never have a jam on the press with a primer going in sideways or no primer at all and then getting powder all over the press and grinding as I advance the brass from station to station. Now loading is smooth and easy with none of the problems I used to have. I now do it this way with both Rifle and Pistol loads.

Here is a pic of the end of the tube.

http://i1354.photobucket.com/albums/q694/Todd_Clark/d1e0c4bf-e296-4b55-a99d-ea1a4819a748_zpsiou4lval.jpg

Looks like the blue tip has been broken. Pull it out of the primer magazine to be sure. If broken, call Dillon for replacement.

Part numbers for primer sizes:
14024 Flexible Orifice Small
or
14003 Flexible Orifice Large

Is the picture of the cup with one or two primers? If it is two you need to check the height of the primer cup. See page 5 of the manual and it shows the measurements ( 1.215" to 1.220" ). A single primer should sit even with the top of the cup so that when the cup is moved out the next primer is sitting on the white pin ( primer feed stop pin ) as it moves out. To me the picture looks like the next primer is sitting into the cup and being pulled out with the cup instead of being held in the tube by the primer feed stop pin. Which has damaged the tip on the feed tube.

I had this problem as well, tried most of the solutions offered here

what worked for me was removing the primer feed stop pin / spring and cleaning the pin hole and pin, flipped the spring over since it appeared to have a little set in it.

crisper return on the primer feed stop pin solved my problem.

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