Skip to content Skip to footer
Please to create posts and topics.

First Time setup 550B

Finished setting up my work bench and then the Dillon 550B over this weekend.

Patience is key and having the Instructional Video was an incredible help... recommend watching it before and during installation for ease of the project.

I do have one question in the instructional video there is a elastic metal band that connects the Powder Bar assembly (Part #20063) and the Plastic Plug (Part #13921) to assure the Powder Dispenser resets... My Dillon 550B did not come with that part or review it in the instructions.

I have ordered a dust cover, caliper, primer tray and extra tool head from Dillon last week but have not received them yet 🙁 Do you guys send out shipping confirmations? After I get those I should be in production.

 For the last six or seven years, the powder measures have not used any return springs to pull the powder bar back. The failsafe return rod is what retracts the powder bar.

 OUr software does not yet allow us to e-mail order confirmations at this time. We are working on some upgrades to allow us to do this, but I expect it to be six to twelve months before that happens.

Hey Dillon,

Thanks so much for the reply.

I had a feeling the spring was no longer used as the machine was functioning as expected with the newer failsafe return bar.

So far so good as I have got familar with the 550B by pressing out some bullets without primers or powder until I can make my final adjustments of the bullet seating and crimping.

Great forum here as well... nothing better then posting and getting the reply back within 24 hours... Nice Job Dillon!!

Why was the design change made to the powder measure return system?

I've got one of the classic 550's with the spring return.  It's wonderful! 

 

When I get too old to shoot, I'll auction it for top dollar. 

 The change was initiated with the introduction of the SL900 shotshell loader. The purpose is that the locking linkage physically blocks the return of the powder bar until the failsafe rod pulls the locking link down and out of the way,then retracts the powder bar to pick up the next powder charge. On automatically indexing machines, this delays the powder bar until after the shellplate has started to rotate, greatly reducing the opportunity of double charging a case.

 On a manually indexed machine such as the Rl550B it doesn't matter as much, but it isn't cost-effective to maintain two different powder measure types. In our testing it has no adverse effect at all on powder drop accuracy, in fact when using extruded powder the accuracy of drops improves slightly.

I also noticed the newer style powder measures the powder hopper is removable, held in place with 2 screws, which is nice. The older style with the return springs has the powder hopper glued in.

By Reloaders, For Reloaders.

Reloader.com © 2026. All rights reserved.

Go to Top
E-mail
Password
Confirm Password