njl Posted October 9, 2016 Share Posted October 9, 2016 I've started having issues with my RL550B intermittently not picking up small primers. I assumed, that having loaded a several hundred rounds in its current config, maybe it was time to clean the primer slide / slide bearing. After doing that and putting it back together, I found I still wasn't getting full unimpeded travel of the primer slide. After taking things apart again, I found that the primer seating cup was hitting/rubbing the primer housing on its way in to pick up a primer. I disassembled/reassembled the primer slide several times, and the only way I could get that slide to slide into the housing without the seating cup hitting the housing was to leave the spring (14033) out. Is it possible the primer seating punch (13757) is just slightly bent and causing the cup to cant just enough to not make it smoothly into the housing? Link to comment Share on other sites More sharing options...
nelson1each Posted October 9, 2016 Share Posted October 9, 2016 When I have had this issue a primer found its way where it shouldn't be and was blocking the full movement. Sounds like you have taken it apart a bunch but maybe take another good look around for a pesky primer hanging out where it shouldn't be? Link to comment Share on other sites More sharing options...
molson Posted October 9, 2016 Share Posted October 9, 2016 Njl, Do a search on google or bing for "Dillon 550b primer track bearing plate upgrade with bearing". It fixes many of the 550b primer pickup issues. Others will have their opinions I am sure, and you would not be poorly served listening to them either. Do not over tighten the bolts holding the primer tube assembly, scotch bright the surfaces of the bottom of the primer assembly, keep it as clean as possible, and adjust the "z" bar thingy correctly are several to start with. My experience with the above upgrade is so positive that it is the #2 recommended upgrade for this press if the person is going to load 9mm or 40SW. EGW U die is #1 for these calibers. If they are loading other calibers than theses, the bearing plate is #1. Others will come along shortly and offer advice as well, you will get it figured out with the help of this knowledgeable group of people. molson Link to comment Share on other sites More sharing options...
njl Posted October 9, 2016 Author Share Posted October 9, 2016 I'm already using an upgraded primer track bearing. The interference between the primer cup and housing is present even with the housing off the press, just trying to slide the primer slide into the housing with both parts in my hands. Link to comment Share on other sites More sharing options...
9x45 Posted October 9, 2016 Share Posted October 9, 2016 (edited) check the primer anvil height, it has to be 1.215-1.220" Edited October 9, 2016 by 9x45 Link to comment Share on other sites More sharing options...
njl Posted October 9, 2016 Author Share Posted October 9, 2016 Height is right and matches the other primer slide that goes into the housing without interference. Link to comment Share on other sites More sharing options...
9x45 Posted October 9, 2016 Share Posted October 9, 2016 Only primer issues I had on old 550 (85) and new SD (00) were from the flexible orifice. Replaced with 650 primer magazine tubes (brass tip) and no issues in over 10 years since. Dillon does not recommend this fix. Link to comment Share on other sites More sharing options...
dillon Posted October 10, 2016 Share Posted October 10, 2016 http://www.dillonprecision.com/kb/article/15/rl550b-primer-feed-issues Link to comment Share on other sites More sharing options...
nelson1each Posted October 11, 2016 Share Posted October 11, 2016 On 10/10/2016 at 10:01 AM, dillon said: http://www.dillonprecision.com/kb/article/15/rl550b-primer-feed-issues Awesome thanks for the info! I just watched some of the videos and learned I have not been caring for my press correctly Link to comment Share on other sites More sharing options...
MyWifeShootsBetter Posted October 14, 2016 Share Posted October 14, 2016 Hopefully you have solved your problem by now, I had a slightly bent punch and it gave me fits until I replaced the punch and cup, seams like its your problem. Link to comment Share on other sites More sharing options...
njl Posted October 14, 2016 Author Share Posted October 14, 2016 It so much solved as worked around. I had a spare complete small primer slide and that one works fine. I'll try one more time to disassemble/reassemble the "bad" one before giving up on it. I was mostly just curious if bending the primer seating punch is something others have done. I suspect that's what's happened. Link to comment Share on other sites More sharing options...
MyWifeShootsBetter Posted October 14, 2016 Share Posted October 14, 2016 I Bent my punch and galled (bad scratches) the inside of the cup depriming 9mm range brass that was crimped. Military rounds from LE Link to comment Share on other sites More sharing options...
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