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Thread: 243 Win to 358 Win

  1. #1
    Boolit Master
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    243 Win to 358 Win

    I have tons of .234 on hand and I am planning to attempt to form it to .358 Win. Should I do it in mutiple steps or just lube it up good and go for it. Maybe give it a good anneal afterwards?

    Sent from my SM-G900V using Tapatalk

  2. #2
    Boolit Master Hannibal's Avatar
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    If you have .308 dies, it would probably be beneficial to start with those.
    I've gone from .308 to .358 without annealing, but in your case, it would probably be beneficial.
    Also, you may wind up with some pretty thin necks. Might pay to reform and check a small batch before doing too many.

    Maybe you could find someone to trade some .243 to for .308 if the necks proove thin?

  3. #3
    Boolit Master
    triggerhappy243's Avatar
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    I side with Hannibal, starting with 308 will give a starting thicker neck. 308 is as easy to come by as 243........... maybe easier. But if you go with 308, use commercial brass.

  4. #4
    Boolit Master
    dragon813gt's Avatar
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    Quote Originally Posted by triggerhappy243 View Post
    maybe easier. But if you go with 308, use commercial brass.
    Can I ask why? I use LC 7.62x51 brass for all my conversions. No issues w/ forming. And the brass lasts for more firings than commercial.

    If I were the OP I would sell or trade the brass he has for 308 or 358 brass. You can convert 243. But as stated above you run the risk of a thin neck. I would do it in two steps. Less chance of losing brass this way. And it won't add much extra time.

    Starline is making 358 brass if you wanted to buy new brass at a reasonable price.

  5. #5
    Boolit Master
    triggerhappy243's Avatar
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    dragon813gt, i always thought the neck area in commercial brass was always softer and stretches easier than military. I started a small project of reforming mil.223(5.56) into 222 rem. they creased more than commercial 223 brass.

  6. #6
    Boolit Master
    triggerhappy243's Avatar
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    but I am in full agreement with the idea of using the 308 brass to reform as opposed to the 243.

  7. #7
    Boolit Mold
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    243 Win to 358 Win

    Im looking for some .243 brass and I could purchase it from you so you can buy .308 or I can trade you some of my .308
    If you are just looking to purchase .308 midway is having a sale $50 for 500 brass today.
    Last edited by Ianagos; 08-24-2017 at 09:03 PM.

  8. #8
    Boolit Master
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    Quote Originally Posted by Ianagos View Post
    Im looking for some .243 brass and I could purchase it from you so you can buy .308 or I can trade you some of my .308
    Ill send you a PM tomorrow sometime and we can talk.

    Sent from my SM-G900V using Tapatalk

  9. #9
    Boolit Master

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    Quote Originally Posted by Ianagos View Post
    Im looking for some .243 brass and I could purchase it from you so you can buy .308 or I can trade you some of my .308
    If you are just looking to purchase .308 midway is having a sale $50 for 500 brass today.
    What brand? Awful cheap, $50/500. Couldnt find it on their site. Must be sold out.

  10. #10
    Boolit Master
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    aarolar,

    Fwiw, .308 government brass is CHEAP. .243 is NOT (at least around here). - My suggestion SELL your .243 & get LC brass for .308.

    Around SA, you can get LOTS of 5.56NATO, 7.62NATO & .30-06 for free or nearly free. = About 6 weeks ago, I was GIVEN > 500 once-fired .30-06 LC cases (to reform to 9.3x62mm) & was told (by a TGT forum member) when I need more to convert to, " - - - just call & I'll meet you someplace, as I have a lot of them."
    The same shooter has gallon bags full of 5.56MM & 7.62NATO, too.
    (Fwiw, 9.3x62 Mauser brass is anything BUT cheap, if you don't form your own from .30-06 or .35 Whelen.)

    just my opinion, tex

  11. #11
    Boolit Mold
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    Quote Originally Posted by BK7saum View Post
    What brand? Awful cheap, $50/500. Couldnt find it on their site. Must be sold out.
    Only avialabe today here is the email I received





    And here is the link
    https://www.midwayusa.com/product/10...***-_-20170823

    Get it while it's cheap

  12. #12
    Boolit Bub
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    I use LC NM Brass for my 358. 243 brass is put aside for my 25-308.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check