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7.62x39mm

rong
Good morning.
I've started reloading for the SKS
and some of the cases look as if there
is a "ring" in the primer pocket.
A small rifle primer is way too small
and a large rifle primer is too large.
Not a big deal because I just have a dozen of these,
but has anyone run into this before?
Thanks
Ron
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Comments

9 comments

Date Votes
  • bpost
    Can you take a photo?

    Is the ring the primer crimp applied to military primer pockets?
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  • rong
    [img]<a target='_blank' title='ImageShack - Image And Video Hosting' href='http://imageshack.us/photo/my-images/222/dscf0003y.jpg/'><img src='http://img222.imageshack.us/img222/3861/dscf0003y.jpg' border='0'/></a><br>Uploaded with <a target='_blank' href='http://imageshack.us'>ImageShack.us</a>[/img]

    There is a discernible ring in the primer pocket
    that I think is stopping the new primer from
    going in. Brass is PMC
    thanks-ron
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  • dcs shooters
    dscf0003y.jpg

    That ring is the crimp left when you punched the primer out. Take a champher tool and ream it out. Then the primer should go in.
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  • midnightrunpaintballer
    chuck your champher tool up into a cordless drill. 2 seconds on low speed should be plenty. I've done thousands of military 223 this way. it works great.
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  • rong
    thanks guys !
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  • Mobuck
    Just a side note for information purposes.
    I've encountered 7.62x39 Winchester commercial cases with a slight primer crimp. Some will reprime w/o reaming but several I've processed required a little cut to allow repriming.
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  • machine gun moran
    quote:Originally posted by midnightrunpaintballer
    chuck your champher tool up into a cordless drill. 2 seconds on low speed should be plenty. I've done thousands of military 223 this way. it works great.



    +1

    For large volumes, I clamp a drill in a vice, and that leaves both hands free for managing the brass.
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  • jonk
    quote:Originally posted by midnightrunpaintballer
    chuck your champher tool up into a cordless drill. 2 seconds on low speed should be plenty. I've done thousands of military 223 this way. it works great.

    -1. There are purpose made tools for this; Lyman primer pocket reamers, and swagers made by Dillon or RCBS. The problem with using a chamfer tool is, it is designed to cut at a taper, and leaves a beveled funnel like cut around the outside of the pocket. Which can- and does- lead to gas erosion of the bolt face. I left a ring on the face of my new Savage 12 in this fashion with loads that otherwise had no pressure signs, thanks to some crappy bulk processed milsurp brass that began its life with me as Ultramax remanufactured ammo.
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  • sandwarrior
    quote:Originally posted by jonk
    quote:Originally posted by midnightrunpaintballer
    chuck your champher tool up into a cordless drill. 2 seconds on low speed should be plenty. I've done thousands of military 223 this way. it works great.

    -1. There are purpose made tools for this; Lyman primer pocket reamers, and swagers made by Dillon or RCBS. The problem with using a chamfer tool is, it is designed to cut at a taper, and leaves a beveled funnel like cut around the outside of the pocket. Which can- and does- lead to gas erosion of the bolt face. I left a ring on the face of my new Savage 12 in this fashion with loads that otherwise had no pressure signs, thanks to some crappy bulk processed milsurp brass that began its life with me as Ultramax remanufactured ammo.


    +1

    Use the lyman or RCBS primer pocket reamers, not your chamfer tool. Lyman now makes an "all-in-one" tool for brass prep for about $25 (how many pounds that converts to I don't know). Pretty useful And you store all the tools in the handle.
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