Joe4d Posted June 22, 2019 Share Posted June 22, 2019 (edited) I am fully vested in a 550 ,(not sure what letter), plenty of powder measures , tool heads, etc,, really want to set up another with large primer,,, load 243/45acp/ 3006 which IIRC all use same shell plate. Then keep my current one set up for small primer, and 40 / 9mm... which again use same shell plate. Ive seen a couple different 550 designations on Ebay,, other than some upgrades or chages here and there are they basically the same ? Meaning will my exisiting tool heads, shell plates, powder funnels, caliber conversions,, yadda yadda all work ? Edited June 22, 2019 by Joe4d Link to comment Share on other sites More sharing options...
hotshot357 Posted June 22, 2019 Share Posted June 22, 2019 I believe all the 550's are the same. For instance the difference between a 550B & a 550C is how the ram link arms are fastened to the press. Every time Dillon makes a change they seem to change the letter.So I guess what I'm trying to say is yes they will work. If it says "for 550" it will work on all 550's.I have a 550B set up for large primers & a SDB set up for small primers and it is a fantastic set up.No changing, just sit down & start pulling the handle!!!! I do have one problem, a couple of weeks ago I picked up another 550B.for a great price ($245.00).I'm thinking about setting it up for .30-30 Winchester. Link to comment Share on other sites More sharing options...
Flatland Shooter Posted June 23, 2019 Share Posted June 23, 2019 Its pretty much 100% compatibility between all the models of 550. The only difference I have heard between my early mid-80's Dillon 550 (no letter) and all newer models is mine will require some milling on the frame if I want to add a Dillon case feeder. Through the years I've upgraded to newer versions of powder measures but I believe everything else on mine is original. Link to comment Share on other sites More sharing options...
Joe4d Posted June 24, 2019 Author Share Posted June 24, 2019 thanks, I bought mine in early 90's, I thought about the SDB for the small primer stuff, which would be 9/40/ and 38/357.. But then Id need more tool heads and caliber conversions. Link to comment Share on other sites More sharing options...
m700 Posted June 25, 2019 Share Posted June 25, 2019 the 550b added the p[owder failsafe. the 550c added maintenance features(zirc fittings/Bolts that you can more easily lubricate instead of a pin up top) I think if you find a B or a C youll be in good shape. Maintenance isn't that much easier on the C over the B from what I can tell. Link to comment Share on other sites More sharing options...
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