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Thread: Dillon 550B Plate 25ACP

  1. #1
    Boolit Master
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    Dillon 550B Plate 25ACP

    Anyone know of a 25 ACP shellholder plate for these?
    I've been reverse engineering one but not sure if it will work.
    I understand that Dillon either offered or started to offer one in 25ACP but ran into problems.
    I've identified a couple of them and can see why they did not continue with production.
    Anyone made any other plates for the 550B?
    I will have limited access to some CNC mills this next fall.
    I'm conversant with MasterCam9.
    Any thoughts?
    Thanks.
    Dave
    Last edited by kywoodwrkr; 05-14-2009 at 08:27 PM. Reason: Said I was conversant, didn't say I could spell!!!

  2. #2
    Boolit Master


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    Have fun!

  3. #3
    Boolit Master



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    kywoodwrker;
    I don't envy you your task. I cannot even imagine trying to reload those (tiny size, itty bitty semi-rim, I hear howling in the back ground...

    Good luck, however!

    Dale53

  4. #4
    Boolit Master
    elk hunter's Avatar
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    KYWOOdWRKR,

    Some where in my stuff I have a 25 acp conversion kit for the 550B. Never did use it. I could dig it out and measure the shell plate for you if you like.

  5. #5
    Boolit Master
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    25 ACP Dillon Shell Plate

    elk hunter,
    I'd appreciate any thing you might be able to provide on this item.
    I won't be back in the shop until next fall so speed is not important.
    I'm going to reverse engineer a couple of other conversion units I have and see if I can break the code on them.(Will have CMM available in fall as well.)
    Due to the single die holder the radius of certain points will remain constant, which may have been the problem with the 25 round as it is so small in diameter. Will have to review the expander/powder measure die as well. But that's why they call it learning I guess.
    Thanks for letting me know that they did make it, albeit for a very short period of time.
    Let me get the basic design together and then I'll possibly be better able to ask pertinent questions.
    Thanks.
    Dave

  6. #6
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    It came with a very unusual pin, that was actually a strip of metal shaped in an arc that lined the edge of the shellplate all the way around, instead the action of a pin that just pushes it in at the actual station. I have one of these sets as well. Let me know if I can help in some way.

    As far as others making these plates, I know that someone has had a bunch of plates made up for the 5.7x28 and that, although dillon does not and will not make one of these, one was offered for sale for a while by a third party.

  7. #7
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    25 acp conversion

    Here are a couple of pictures of the conversion. You have a PM with dimentions.
    Last edited by elk hunter; 07-25-2009 at 10:03 AM.

  8. #8
    Boolit Master
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    25ACP Ouch!

    Elk Hunter and happy7,
    Thank you both for the wonderful responses.
    I have at this time got preliminary drawings done for the conversion unit and a fixture to hold the plate while milling.
    I say preliminary because I will have to clean my 550B of smoke and etc to get some other measurements I need.
    The plate itself is pretty staright forward I think
    Those 'pins' are an entirely different thing.
    Right now I'm thinking about taking a piece of flat brass for the wing or body and drilling a hole of correct size and press fitting a piece of round stock into it and then lightly welding the two together. Brownells silver solder might be better choice, I'll just have to experiment and see which I like best. Then design a fixture for holding while I mill it out.
    I do want to say thank you once more.
    First for verifying that my memory is not completely shot, and then for the excellent feedback on this.
    Guess I wait till September now so I can start my milling on it.
    Dave
    Last edited by kywoodwrkr; 05-21-2009 at 09:30 PM. Reason: Can't speil.

  9. #9
    Boolit Master




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    Man, I do NOT envy you - reloading 25ACP's is a treat I have never experienced, and intend for it to stay that way! Like Dale53, said, itty-bitty all over the effort - itty-bitty pea-sized bullets, itty-bitty brass, itty-bitty powder charge, &cetera.

    I can see it as an exercise, but for practicality, it's way down.
    Echo
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  10. #10
    Boolit Mold gunlovingsob's Avatar
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    An interesting little artical about loading the 25 ACP

    Hi, newbe here, I just read an interesting artical about loading the 25 acp and some of the problems it can present, I thought you might be interested, If you havent already read it, February's Guns&Ammo page 20

  11. #11
    Boolit Master
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    WELCOME aboard

    Quote Originally Posted by gunlovingsonofabitch View Post
    Hi, newbe here, I thought you might be interested, If you havent already read it, February's Guns&Ammo page 20
    Welcome and thanks for the heads up.
    Am just taking a break from class work and even had the Dillon shellholder on the class computer(MasterCam) screen.
    We will be doing wire EDM this semester and I want to try cutting one out.
    Already have CNC mill programs in place, just need time.
    Bought some plate brass to make, for the lack of correct name, indexing arms from.
    Was going to EDM them but brass wire and brass-not sure of that at this time.
    I am originally from IL.
    Iroquois Co and later Ford Co and then Jackson for school.(SIU)
    Again, welcome to the friendliest forums on the Wide World Wait, I mean Wide World Web.
    And thanks for the information.
    Dave

  12. #12
    Boolit Mold
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    I have been using the Dillon 25 ACP conversion for about 7 years without a problem, A lot easier then a single stage. David

  13. #13
    Boolit Man lisa_wolf's Avatar
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    Quote Originally Posted by happy7 View Post
    As far as others making these plates, I know that someone has had a bunch of plates made up for the 5.7x28 and that, although dillon does not and will not make one of these, one was offered for sale for a while by a third party.
    Hi guys We sell the Dillon 550 shell plate for the 5.7x28mm
    http://www.eliteammunition.net/reloading.html
    [CENTER]I am the God Fearing, Gun Toting, Flag Waving AMERICAN you were warned about!!

  14. #14
    Boolit Mold
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    I know this is an old thread, but did you have any luck with the 25 ACP shellplate?

  15. #15
    Boolit Master
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    Dave,
    PM answered.
    Trying to put finishing touches on shell holder and rings(buttons) next week.
    Expander and powder measure situation still in the air.
    Looked at the 'standard' Dillon measure last night to see what if anything I can make to work in it.
    ie. Like preset bar, sliding secondary bar etc. etc.

    Thanks.

  16. #16
    Boolit Master
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    If I remember correctly, the conversion came with a special powder bar.
    BIG OR SMALL I LIKE THEM ALL, 577 TO 22 HORNET.

  17. #17
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    scarry scarney's Avatar
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    I have a little 25 acp, dies and mold. One of these days, I need to try and load this little round. Anyone have a copy of the article gunlovingsob talked about? Find a Dillon conversion kit? I only have a single station shell holder for mine. But it do have a lathesmith sizing die for my star! I need to retire so I have some time to reload.

  18. #18
    Boolit Master
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    elk hunter,
    Thanks again for the valuable pictures back then.
    Am going to try and utilize them to completion of this project.
    Trying to scrounge up machine time, when students aren't on them to finish projects.
    Actually looking good if I do say so myself.
    Will attempt to use Lee disk powder measure on press.
    Thanks.
    Don't have article but have been reloading these for many, many years.
    Have about 2-3k loaded as I peck here.
    Have the Lyman SC mold in HP.
    Last edited by kywoodwrkr; 11-23-2013 at 12:17 PM. Reason: After Thought :-|

  19. #19
    Boolit Man
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    My question is why? Mother n law friend shot an intruder at point blank with her 25 acp and it just pissed him off that he raped and then nearly beat her to death. After we substituted my mother n laws 25 for a sp101 in 357 I was playing with the little gun and was stupefied on its worthlessness. I shot a rusty fire barrel (55 gallon drum) at 30 paces and just a dent? 15 paces I barely pierced it? Disgusted I walked away and shot a board on my firewood stack. The bullet bounced off and hit me in the forehead and didn't even leave a welt??

    So 22lr yes, 380 yes, 32 acp eeeeee maybe, 25 acp why??????

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check