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Thread: Resizing 7.7 JAP brass

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    Senior Veteran nevada's Avatar
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    Resizing 7.7 JAP brass

    I bought a used Lee 7.7 JAP die set and found out that my brass expands so much in the chamber that it is impossible to resize. I have also read that Lee resizing dies runs on the small side. I figure I will order a Lee custom collet neck sizing die since I have only one Arisaka. The fired cases allow the bolt to be closed easily on them. I'll use it whenever I get 20 empty cases. I will check other makers dies first. Thought you might like to know.
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    Senior Veteran nevada's Avatar
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    I use Dillon case lube. I really like it. I also have different die makes. This is my first die failure.
    Rotating the brass made no difference. If I got the case half way into the die I had to beat the handle to get it back out.
    The Lee collet die is a neck sizing die. Two fired cases and a bullet or two are sent in and the die made so the brass won't get stuck. 'Only' $70.
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    Senior Veteran nevada's Avatar
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    I use Dillon case lube. I like it. I also have different die makes. This is my first die failure.
    I can barely get the case half way into the die, then have to beat the handle to get it out.
    The Lee collet die is a neck sizing die. Send in two fired cases, a bullet and $70 and wait two months.
    RRRROOOWWWRRR PHHT PHHT I AM THE FORCE!

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    Senior Veteran nevada's Avatar
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    Sorry about the double post. I guess my computer is screwing with me.
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    What did you use for lube? Did you rotate the case and run it up the die 3 or 4 times? Sounds like what I'm running into trying to use brass shot in my Spanish Mauser to use in the M14. I got a set of RCBS small base
    X-Dies for the M14 as I suspect the chamber is on the small side.

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    Senior Veteran fal_762x51's Avatar
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    Have you thought about just neck sizing the brass?


    Dispenser of the Haterade.

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    Senior Veteran jbruney's Avatar
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    I tired early on trying to use the case lubes and started buying lanolin at the drug store. It's in the breast feeding supplies....Anyway the brass had less damage and seizing during my caliber change adventures.

    My dies are a mixture of almost every make so I know my issues were due to the lube.
    Last edited by jbruney; 02-03-2018 at 11:45 AM.
    Joe
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    Quote Originally Posted by nevada View Post
    I use Dillon case lube. I like it. I also have different die makes. This is my first die failure.
    I can barely get the case half way into the die, then have to beat the handle to get it out.
    The Lee collet die is a neck sizing die. Send in two fired cases, a bullet and $70 and wait two months.
    I've never used Dillon lube, but some brands you have to let dry before sizing. If you have any other .30 neck size dies they "might" work.

  9. #9
    Senior Veteran nevada's Avatar
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    I thought of the much less expensive, in stock, 303 and 7.62x54R, neck sizing collet dies. But there would be no guarantee I could get the fat 7.7 cases in them far enough.
    The Dillon lube works for me wet or dry. It doesn't completely dry, and by the time I've reloaded 5-6 cases it has migrated around the case and is in it's mostly dry state. It's been so long since I used another lube I can't remember what it was or if I liked it.
    RRRROOOWWWRRR PHHT PHHT I AM THE FORCE!

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