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.40 Cal noob reloading question

Discussion in 'Ammunition & Reloading' started by 22nut, Oct 14, 2014.

  1. 22nut

    22nut Oregon New Member

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    Ok so I'm working with an rcbs rock chucker and think my carbide dies may be set incorrectly. Since I don't yet have any powder and I'm totally new at this I decided to deprime some of my few thousand rounds to prep for when I have powder.

    Set up the die according to the directions but after pressing out several primers I examine the cases and seem to find that they appear to be bulging in the bottom of the case right above the primer pocket.

    Don't have a micrometer yet so I can't give measurements but I don't want to blow through deforming the rest of my brass if this isn't working out. ImageUploadedByTapatalk1413327149.189037.jpg

    5 of the 6 in this photo have been pressed. One has not. Am I seeing things or is my press deforming the brass? Look closely at the bottom 1/3 of the case.

    Any advice is welcome. I'm at a loss here.
     
  2. rick benjamin

    rick benjamin USA, Or, Damascus Secure the drama Silver Supporter 2016 Volunteer

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    Your decapping punch is screwed-down too much.
    Discard those distorted cases.
    Back the decapper up into the die, all the way up (counter-clockwise).
    Raise the ram with shell holder all the way up.
    Screw sizing die down till it touches the shell holder.
    Lower the ram.
    Screw sizing die down (clockwise) 1/8 of a turn.
    Lock sizing die into place.
    Insert un-lubed case into shell holder (lube the case if not a carbide die).
    (changed from lubed to unlube, thanks elsie)
    Raise the ram till the case is all the way into the sizing die (you will feel a small but perceptible "bump" as the ram and shell holder kiss the sizing die).
    Screw (clockwise) the decapping punch down till you meet resistance.
    Lower the ram to the bottom of it's stroke.
    Screw the decapping punch (clockwise) down one turn.
    Raise the ram to it's top. Did the primer pop out? If not, lower ram, screw decapping punch down another turn. Repeat until primer pops out of the case.
    Then, screw the decapping pin down one more turn, and lock it in place.

    Do not use vice grips, etc to lock stuff down. Not good
    Finger tight has worked for me since 1976.
     
    Last edited: Oct 14, 2014
  3. elsie

    elsie Way over there on the left Well-Known Member

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    Just one correction - don't use lube with a carbide die.

    Other than that, it sound just right.

    What manufacturer's dies are you using?


    elsie
     
  4. 22nut

    22nut Oregon New Member

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    Rcbs dies. Thanks. I'll give that a shot when I'm next home. Glad I quit while I was behind..... Better a few hundred toast than a few thousand.
     
  5. JRuby

    JRuby St. Helens Oregon Well-Known Member

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    I would check to see if the brass was bulged before you started depriming them. I am not trying to start anything here, however many 40S&W barrels don't seem to fully support the cartridge, Glocks are kind of known for this. I have seen my S&W 40's do the same. Just something to check.
     
  6. 22nut

    22nut Oregon New Member

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    Hk USPc in .40 but I'll check some of my factory brass before and after firing. Great ideas. Thanks all.
     
  7. rick benjamin

    rick benjamin USA, Or, Damascus Secure the drama Silver Supporter 2016 Volunteer

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    Save those cases in a "scrap brass" bucket.
    Straight wall pistol cases will re-size and decap easily.
    Shouldn't take any effort. If it does, something's not right.
    Let us know how you're doing.
     
  8. John Gault

    John Gault clackamas county Bronze Supporter Bronze Supporter

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  9. deadeye

    deadeye Albany,OR. Moderator Staff Member

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    I don't think this is a primer punch issue or for that matter an issue at all.
    You state 1/3 above the primer is bulged, this is normal. The sizing die does not size the full length of the brass due to the die bottom being belled at the opening.

    Do the marks in the pic depict where your issue is? ImageUploadedByTapatalk1413327149_189037.jpg
     
  10. Mikej

    Mikej Portland Gold Supporter Gold Supporter 2015 Volunteer 2016 Volunteer

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    What Deadeye says........If you look inside the case you'll see the webbing comes up inside to about the place the sizing die stops sizing, so there would be no reason for the die to size all the way to the rim.

    I bought once fired range brass brass from the get-go for my CZ 75 .40cal and a bunch was obviously shot in Glocks as there was a slight bulge in the cases near the bottom on one side. That has been no issue and some of the cases are at four times reloaded. Brass is pretty darned malleable (http://www.merriam-webster.com/dictionary/malleable). I once accidentally loaded the mag with 9mm in the CZ .40 and it shot! The front half of the 9mm brass had been stretched out to .428" from .387" with out splitting. It didn't cycle the slide though. I wouldn't recommend trying this on purpose!

    Also, something Rick said I tend to disagree with. I turn the sizing die down until it contacts the shell holder, and no more. I see no advantage to that, only a tiny bit more stress on the ram components that over time may cause extra wear.

    Mike
     
  11. scrandall01215

    scrandall01215 Washougal,WA Well-Known Member

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    Do this follow the directions that came with it it's not that complicated and when your done it will be set correctly as per manufacture guidelines. I believe they know how to set them since they've been making the stuff for the last 100yrs or so.
    Also they look just like mine when I size/ deprime my 9mm,40., and 10mm.
    Stacy
     
    Steve M likes this.
  12. Steve M

    Steve M Beaverton, OR Well-Known Member

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    I think what you are seeing is where the carbine ring stops during the re-size operation. You should check then in a Wilson gauge.

    A few months ago I went through about 1500 pieces of once fired .40 S&W range brass. I tossed the few that had really bad bulges and kept the rest. Following the re-size operation each case was checked with a Wilson case gauge. Those failing to readily headspace in the gauge were re-sized again which often resolved the issue, but a few still had to be tossed. My firearm chambers would have readily accepted the brass that almost fit the Wilson gauge, but .40S&W brass is dirt cheap and plentiful so I opted to be very tight with my requirements.
     
    John Gault likes this.
  13. elsie

    elsie Way over there on the left Well-Known Member

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    If you're worried about bulging at the web, Redding makes a push-through die that will remove any bulges around the base. I think Lee also makes one but the Redding is simpler.


    elsie