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Thread: Neck turning/reaming

  1. #1
    SD Regular Greener Jim's Avatar
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    Neck turning/reaming

    Hypothetically, if I wanted to cut a case down a lot, as in below the shoulder, to create a short straight walled case (obviously either rimmed or belted brass) would I be better reaming or turning the neck?

    As an example, 458x1.5" Barnes is any case based on the 375 h&h shortened to 1.5". Now the brass will be much thicker further down the case so if I seat a bullet it may not chamber as it'll be wide at the case mouth.
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  2. #2
    would think you would be better cutting straight into the side wall if you are removing that much

    even without a lathe I cut down a 300 Win Mag case just above the web using a Lee Lock stud in a drill and a junior hacksaw blade.

    remarkably tidy job through i say it myself

  3. #3
    as Bewsh says i use to form pistol cals out of 308 brass with this method or using a wilson type lathe
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    SD Regular Greener Jim's Avatar
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    44 Automag perchance spud? Lucky bugger if that's the case.

    So you would both recommend neck turning over inside neck reaming then?
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  5. #5
    are you talking about the first cutting to shorten or the wall thinning required after that?
    I was referring to the former

  6. #6
    SD Regular Greener Jim's Avatar
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    I guessed as much, I was referring to the latter. Apologies for my lack of clarity.
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  7. #7
    Quote Originally Posted by Greener Jim View Post
    I guessed as much, I was referring to the latter. Apologies for my lack of clarity.
    I have no experience with a Barnes 458x1.5 but I have some with the Barnes 458x2" cartridge. I built one for a guy on a Pattern 14 action once. The neck wasn't thinned at all. A properly ground reamer will take the neck thickness into consideration like the 300AAC, or 20 Practical. It was a straight saw and trim to length deal. If you haven't had the reamer made, don't let the maker talk you into any dimension that alters from this. ~Muir

  8. #8
    SD Regular Greener Jim's Avatar
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    Forgive my naivity with this but if you don't thin the new mouth wouldn't it bulge when you seated the bullet?
    Last edited by Greener Jim; 28-10-2015 at 21:29.
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  9. #9
    At the shoulder the stock 375H&H is .460 but trimmed to down 3/8" from that mark to 2" length it is around .480 external dimension. Think about it: What would that pretty much straight cartridge look like if you neck turned it?? It would look ruined. Your need for reaming might be valid but your brass, dies and reamer will dictate that. I don't remember doing anything other than shooting the one I built. (.375 H&H Winchester brass) ~Muir

  10. #10
    SD Regular Greener Jim's Avatar
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    Happy days. To clarify I'm not planning on a .458x1.5" (or 2" for that matter)

    Thanks for the help Muir, I'll get hold of some brass, cut it down and measure it up. I felt that reaming may be the way forward if the neck needed thinning but thought I'd ask just in case. Nice to know that I may even not need to.
    Any Questions Feel Free to PM me

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