How to remove military crimp?

Discussion in 'The Ammo & Reloading Forum' started by 1911Man, Mar 22, 2010.

  1. 1911Man

    1911Man New Member

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    How do I go about doing this? I'm starting to get quite a pile of military brass and am ready to learn.
  2. doug66

    doug66 New Member

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    I have a RCBS swaging tool that works well. Mounts on ram of a single stage press. I have stuck the pointed end of a deburring tool into primer pocket, and give a twist. Works well also.
    I hand prime with the Lee gizmo, so I can feel if I have removed enough of the crimp. I like the the deburring tool method the best.
  3. howlnmad

    howlnmad Well-Known Member

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    There are several ways to remove a military crimp.
    1- there is a crimp remover availible from reloading suppliers
    2-some say you can remove them with a case chamfering tool
    3-I went out to my woodshop and got a countersink for screw holes. Chucked in my bench top drill-press and go at it.

    Just remember, you only want to remove the crimp, you're not cutting new pockets.

    howlnmad
  4. res45

    res45 New Member

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    How many you have to do will probably determine what system you want to use,about ever reloading equipment supplier makes some type of tool be it a small hand tool,press mounted like RCBS or stand alone system like the Dillion or one that used with a case trimmer setup.

    I don't do that much military brass so a small cheap hand tool works for me I use this one http://www.grafs.com/product/260039 the handles also works with primer pocket cleaner tips. There very sharp and cut the crimp out with about one or two turns.
  5. 312shooter

    312shooter Active Member

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    Easy, take a chamfering and deburring tool and a drill. chuck the end of the deburring side into the drill and start slowly with moderate pressure with the chamfering end inside the primer pocket. You will see a single coil of brass spiral off and your done. Absolute results everytime and an inexpensive way to get uniform results.
  6. army mp

    army mp Member

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    I use the primer pocket swag, I load a lot of AR ammo and believe the swag a better choice for the Semi rifles, I have never had a slam fire. And believe that trimming the pockets too much contributes to loose primers.
  7. Skipper

    Skipper Member

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  8. JLA

    JLA Well-Known Member

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    pointy end of a deburr tool...
  9. oldreliable45120

    oldreliable45120 New Member

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    I use the Hornady crimp remover. I have one for both lg and sm primer pockets.When I have alot of mi brass to prep I unscrew the tool head from the handle and chuck in in a cordless drill.It works great doing it this way because you cant overdo the chamfer on the case, the tool will bottom out before you can overdo it. I used to use the RCBS swaging tool but it took way too long.
  10. medalguy

    medalguy Member

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    It depends on how much brass you're doing. Dillon makes a great swaging tool that is extremely fast and easy to use. I think it's a bit pricey but it sure works great. Amortizing the cost over thousands of rounds of ammo brings the cost very low and it's very fast and totally repeatable. No guesswork and no ruined brass.
  11. LDBennett

    LDBennett Well-Known Member

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    My experience may be different than most but I bought about 1000 cases, 308 , of Lake City (Mil-Surp). I deprimed them all with a standard sizing die and then attempted to reform the crimped primer pockets with my Dillon Tool. The few case's prime pockets done with the tool were not uniformly formed comparing one to the other so I broke out the instructions. It seems, according to Dillon, that military brass can vary in head thickness enough to create this situation.

    I had to resort to using the rotary tool made by RCBS to reshape the primer pockets to remove the crimp.

    The Dillon tool is probably not all that useful if it can not do ordinary Mil-Surp 308 brass from Lake City!

    LDBennett
  12. howlnmad

    howlnmad Well-Known Member

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    LD

    You did not just put down a Dillon product, did you? Just kidding :D.

    howlnmad
  13. LDBennett

    LDBennett Well-Known Member

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    The Dillon tool would work great IF ............. Mil Surp brass were more consistent

    So you see I am not putting down Dillon, but the brass. Too bad that about the only brass you'll ever need to remove the crimp on is Mil Surp brass.

    There are a few tools that Dillon makes that I will not recommend but there are tons of tools that Lee makes that I absolutely will not recommend. I am fair in that I like the Lee Factory Crimp Die design, just not the materials Lee chooses to use to make it.

    OK... I give up. I put down a Dillon tool. There goes my subsidy from Dillon for this month. :) :)

    LDBennett
  14. medalguy

    medalguy Member

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    I have also found some variance in 308 brass but not very much. Lately I've been reloading some 9mm and found quite a bit of web thickness variance in that brass. Generally when I get LC 308 brass it's all one year and is usually pretty consistent.
  15. LDBennett

    LDBennett Well-Known Member

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    I found this head thickness variation across the same year head stamp. This was 308 LC brass.

    I think the Dillon tool to be not useful, if this is the case with all mil-surp brass as their instructions imply. Actually the RCBS tool when powered takes less time.

    When I recently did some 50BMG brass with crimped in primers I chucked up each case in my lathe and used a counter sink. That also worked just fine but thank goodness I only had to do 50 cases.

    LDBennett
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