Freeloader Reloader
Freeloader Reload...
12 posts
Joined June 2013

Primer Feed Problem

Posted this topic before but I never saw it on the forum so I am trying again. I am trying to load some .44 Magnum rounds on my Dillon RL550 B and am experiencing some problems with the automatic power feed system. Mainly...it doesn't feed the primers.  I had problems with the Large Primer Magazine tube and it had a jammed primer in it so I ordered a new one (red tip). Made sure that the new magazine was seated in the groove correctly, right on top of the stop pin. Cycled the primer slide with the empty magazine and everything seemed fine. The Large Primer cup lined up with the mouth of the magazine tube perfectly on the down stroke, the primer retaining pin was moved out of the way by the primer cup and on the upstroke the primer cup lined up perfectly under the shell plate. GREAT! When I load the magazine...even with just one primer or 10, it doesn't matter...the primer cup does not go all the way back, does not line up under the magazine and, consequently, does not release the primer stop pin. I sent Dillon Tech Support an email and received a reply yesterday saying that some part(s) and instructions were on the way and if they didn't help to send the machine in for free repair. Great! I was just wondering if anyone out there had experienced a similar problem and, if so, were you able to rectify it and how. Look forward to hearing from you.
dillon
Administrator
dillon
3,222 posts
Joined July 2007

RE: Primer Feed Problem

Remove the primer slide and measure the dimension from the underside of the primer slide to the top of the cup. THis should be 1.215-1.220", as shown on the exploded drawing. It sounds like the cup and punch are too high. If this is the case, use a c-clamp or vise to reseat these parts and hold them in place while you retighten the set screw.
Freeloader Reloader
Freeloader Reload...
12 posts
Joined June 2013

RE: Primer Feed Problem

Thanks so much for the info. I will most certainly check that out as soon as I can do so.
rockhammer53
rockhammer53
1 post
Joined July 2011

RE: Primer Feed Problem

I had a similar problem with the small primers for my .223. The primer slide would sometimes stick out of position, not move fully into place under the cases. I found that loosening the primer tube mount and realigning and retightening fixed the problem.
Freeloader Reloader
Freeloader Reload...
12 posts
Joined June 2013

RE: Primer Feed Problem

The Dillon Rep that said the primer cup was set too high was right on the money. Lowered it down according to spec and it works like...well, it works like a Dillon!
Very impressed with the Forum and especially with the Dillon technical support and customer service. This is the way a company should be run! keep it up, Big Blue!
Freeloader Reloader
Freeloader Reload...
12 posts
Joined June 2013

RE: Primer Feed Problem

The Dillon Rep that said the primer cup was set too high was right on the money. Lowered it down according to spec and it works like...well, it works like a Dillon!
Very impressed with the Forum and especially with the Dillon technical support and customer service. This is the way a company should be run! keep it up, Big Blue!
Slipstick
Slipstick
3 posts
Joined October 2013

RE: Primer Feed Problem

I opine that the primer feed is THE weak link in the RL550B design. Everything has to be kept squeaky clean or it misfeeds or no-feeds. I have had primers fail to drop, or the slide jerk forward and the primer jump out of the cup. I previously used Graphite, but have discovered a locally made (Lansing MI) product called Gunzilla. It cleans away powder or other residue and leaves a dry, slick surface that (so far) has performed better than Graphite, also without the carbon mess.
admin3
admin3
5 posts
Joined March 2015

RE: Primer Feed Problem

Just got my new 550b and after a few hours familiarizing myself with it I was off and running. Loaded up a bunch of ammo everything was fine. Then came time to change out the primer slide to the large pistol primer slide, along with the primer tube and all that, and that is when the you know what hit the rotating cooling device.

Few observations: with the help of a dental mirror and a good flash light (head mounted) I could see that the slide would not retract under the tip of the primer tube, in other words the upper rim of the primer cup was too tall to go under the tip of the primer tube. This is something that must take place if you are to pick up a primer. Secondly, that there was no way I could attain the adjustment tolerances found in the first few pages of the manual. The 1.215- to 1.220 if I recall correctly? This is a critical adjustment because it would insure that you pulled out only one primer and not two like you would if the primer seating post was too deeply seated in the slide. Too shallow and you hit the tip of the primer tube. So I set my sights on getting the proper depth, good luck with that one!

Part of the problem is the primer seating post has a narrower diameter inside and a bevel just where you need the Allen screw to pin the post in place at the proper depth. The Allen screw that also has a shamfer on its tip, not a huge one but enough to wedge its counterpart on the post into a position too high or too deep to have the correct depth. Also it doesn't hold the post square to the bottom of the shell plate so that you get the lip of the primer cup hitting the underside of the shell plate when actuating the lever causing it to bind and then snap into place tossing the primer verticle, most often not where you want it. I am still thinking about solutions, one of which is to drill out the hole the post goes in, thread it, then put an Allen head screw milled flat and getting a brad tipped set screw like the one for the shell holder and using that to lock it in place. That way I could get a precise adjustment. Of course I would heed to mill the screw head to properly fit the primer cup, that and a good metal lathe should be doable. I hesitate expecting Dillon to fix the problem because as I see it it is a design flaw. There are many people having this problem it seems, so heck, if I can come up with a simple way of fixing it, I am sure Dillon and all the folks having problems would appreciate it.
hunterfisher
hunterfisher
1 post
Joined September 2016

RE: Primer Feed Problem

I am herby joining the primer feed problem committee. Instead of trying to remedy the problem myself, I am first going to aggressively seek input and assistance form the tech crew at Dillon. I have had unbelievable great help from them with every single issue I have had with their equipment. I agree that the primer feed system is the weak link on the 550B and will discuss that issue with them and get back on here with the results of my conversations with them. In the interim gents...... clean , clean and clean is the main thing that has helped me. Sometimes to the point of defeating the speed of using a progressive but beats searching for primers or risk bending a part. Will try to address this again soon.
tires2burn
tires2burn
4 posts
Joined November 2013

RE: Primer Feed Problem

I have never had the problems you are discussing. I just got my 550B back from Dillon and they pretty much changed all the parts that wear. It had slop in the base plate and would be off center when priming. They also swapped out the whole primer system. Now the primer catches on the shell plate when you index it. I tried to adj the primer stud & cup to 1.215- 1.220 and when I tighten the set screw down it sucks the stud back to 1.205. Its like the stud doesn't have a long enough slot for adj. I got it set to 1.218 but had to leave the set screw loose. Have to call Dillon.
MattMo
MattMo
1 post
Joined February 2019

RE: Primer Feed Problem

I have been reloading for awhile now and I just got the 550 used. I was having what I believe to be the same issue. Everything would work fine during a test run with no primers in the tube but when I loaded them in the primer tube the cup would catch on the Radius of the primer that was to be loaded. I found online the overall length is to be 1.215-1.220. I adjusted this to nominal and it works just fine with small pistol primers. I did the same thing with large pistol primers setting it at 1.220 and it is short by probably .025. I tried tapping the top of the tube very lightly but it was already seated. I believe I can easily remedy this issue by going higher but was wondering if anyone else has issues when they have the right height settings. I could easily hand prime all my cases but would like to avoid this. Any help would be appreciated.