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Thread: 458 SOCOM AR-15

  1. 05-26-2013, 00:50 #31
    babirl
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    Quote Originally Posted by SideShow Bob View Post
    Wow, though I was going to have to break out some popcorn and pull up a comfortable chair and watch the fireworks....

    Too bad we are so widely spread out across the state, or we could have a 458S meet & shoot.
    there seems to be a cornucopia of knowledge for this platform here, and I would love to pick a few brains while sending large chunks of lead down range.



    I'm not a smart man -- We all get a bit crazy and stressed at times!

    On the other hand, I'd love to keep "AR Big Bores" on track and no additional BS introduced.

    B2

    FWIW, PMAGs can be problematic/non-functional w/ the custom developed Barnes 458 TTSX loads w/out grinding out the upper rib... OTOH, GI Mags w/ the 30-sec Dremel half-moon job work mucho better. So far, unmodified PMAGs remain great for most anything shorter than ~2.10 - 2.13 COAL (TTSX is typically 2.250).

    I can't vouch for any of the huge ~400-500 GR sub-sonic rounds nor suppressed anything.

    Reminder TO ALL: If you're shooting a 458S and see flattening on your primers/see marks you're WAY too hot!

    ETA: spyder what are your thoughts?
    Last edited by babirl; 05-26-2013 at 04:45.
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  2. 06-02-2013, 03:05 #32
    babirl
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    Midway has .458 300 GR Sierra Pro-Hunter bullets in stock: http://www.midwayusa.com/product/578...nose-box-of-50 . Not the cheapest I've seen/not bad, but if you need 'em Sierra is a good company/product... Rumor is there are more REM bulk bullets on the way, but they likely won't be much cheaper.

    As always, use safe reloading practices but this projectile is basically the same as the 300 REM and Hornady... Unless you're at near max loads, it should be GTG. Reminder: Weigh your charges carefully as you're basically still dealing w/ magnum pistol powders and easy to get a bit hot even on these reloads and wasn't designed to run at high pressure like most AR rounds.

    B2

    ETA: Still waiting on spyder to check in w/ additional 458S info... I'm always willing to help w/ cases/projectiles or whatever as the 458S is a very awesome AR variant but not one to be trifled with. Then again, I'm just a troll.
    Last edited by babirl; 06-02-2013 at 04:01.
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  3. 06-02-2013, 10:47 #33
    SideShow Bob
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    I picked up on a couple of boxes of the Hornadys a few weeks back when they were in stock.
    http://www.midwayusa.com/product/699...oint-box-of-50
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  4. 06-14-2013, 00:33 #34
    babirl
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    Quote Originally Posted by SideShow Bob View Post
    I picked up on a couple of boxes of the Hornadys a few weeks back when they were in stock.
    http://www.midwayusa.com/product/699...oint-box-of-50

    SideShow Bob - I recently came across, err found an unopened box of 50 Barnes .458 (458 SOCOM label) 330 GR "Banded Solids"/Moly marked I forgot I had...


    No BS, do you have any experience/info?

    I imagine with Barnes quality and "banded solids" they'll be good for brown bears, buffalo, engine blocks and the occasional neighborhood squirrel... I love the custom 458S TTSX projectiles but I can imagine a 330 GR solid punching pretty deep and both designed for relatively low-velocity.

    B2

    In all seriousness, 100% legally purchased/owned but I haven't researched and certainly not smart enough to remember if these are part of the "armor penetrating/no future sales" of certain Barnes solids from our ever benevolent BATFE... Figured you might help a "brudder" out as sadly the 458S Forum is a bit lame currently.


    ETA: I'm on so many "lists" I don't care... Still waiting on sypder's 458 SOCOM thoughts.
    Last edited by babirl; 06-14-2013 at 01:04.
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  5. 06-21-2013, 01:02 #35
    babirl
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    Quote Originally Posted by spyder View Post
    Huh? I've built three... and by built I mean profiled, chambered, threaded, mounted the barrel extension, modified the extension, port opening, bolt face, and extractor, bla bla bla...actually... that is almost all there is to it...

    Who is rumore?

    Still waiting...
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  6. 07-11-2013, 03:54 #36
    babirl
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    Quote Originally Posted by babirl View Post
    Still waiting...
    NO RESPONSE = Noted...

    OK, I'm no expert, nor a photographer, but a SERIOUS reminder for anybody with a 458 SOCOM/reloading how easy it is to get way over-pressure w/ previously referenced "pointy bullets"...






    Both projectiles are 300 GR but please note the projectile length vs. case capacity... The custom 458S TTSX is nearly perfect/designed to expand even sub-sonic but it's WAY different than most .458 300gr loads!

    As pictured, I did invest in getting the 458 Barnes TTSX manufactured... spyder please check in and where are your 458S builds?

    Still willing to help...

    B2
    Last edited by babirl; 07-11-2013 at 04:11.
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  7. 07-12-2013, 19:56 #37
    AKA-Spook
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    Click image for larger version.  Name: DSC00034.jpg  Views: 69  Size: 95.6 KB  ID: 31415 here's a couple
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  8. 07-12-2013, 20:06 #38
    AKA-Spook
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    Click image for larger version.  Name: DSC00032.jpg  Views: 66  Size: 70.9 KB  ID: 31419another one,for real subsonic work
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  9. 07-12-2013, 20:08 #39
    AKA-Spook
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    Click image for larger version.  Name: DSC00036.jpg  Views: 60  Size: 77.7 KB  ID: 31421 this being the size thread some builders use for cans, I use a larger diameter.
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  10. 07-12-2013, 20:11 #40
    AKA-Spook
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    Click image for larger version.  Name: DSC00037.jpg  Views: 67  Size: 78.3 KB  ID: 31423socom , way left , with 2 lathe turned projectiles , the one thats not in the case makes a mess out of an elk.
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