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Thread: Dismal Range Report: 358 Winchester/MR-2000 powder.

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    Member mainer_in_ak's Avatar
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    Default Dismal Range Report: 358 Winchester/MR-2000 powder.

    With the Barnes Tipped Triple Shock (200 grain) and 250 grain speer Hot-Cors, the MR-2000 was wayyyyy too slow of a powder. With both of these bullets almost the same length, I topped out at 49.5 grains of powder for the 200 grain Barnes, and 50.5 grains with the 250 grain Speer.

    Didn't see anything above 2,200 fps from either bullet. Lesson learned: MR-2000 will surely hot-rod the 308 Winchester with heavy bullets, but yah need to get bolder with the 358 Win and go with something substantially faster (burn rate).

    With the new Reloader 10x powder having a slower burn rate than Reloader 7, I'll give this powder a try next.

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    Member mainer_in_ak's Avatar
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    yes, that powder is even slower than mr-2000. It would be a good powder for something like an 8mm rem mag or a 338 RUM

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    Member Matt's Avatar
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    You got any Varget or TAC on hand?

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    Mainer, if you can find some, try Accurate 2015. Good old IMR 3031 works well, too.

    From Barnes Manual NO.1:

    BULLET________ POWDER___ START__ MAX
    180 gr X-bullet __ Acc 2015 __ 45.0 ___ 49.0 - 2875 fps
    200 gr X-bullet __ Acc 2015 __ 44.0 ___ 48.0 - 2794
    225 gr X-bullet __ Acc 2015 __ 41.0 ___ 45.0 - 2592
    250 gr X-bullet __ Acc 2015 __ 39.0 ___ 43.0 - 2415

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    How 'bout reloader-15?
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    Member mainer_in_ak's Avatar
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    Matt, Drow, Nitro,

    Thanks for the powder recommendations. All four of those powders that you guys mentioned, are certainly faster burning than MR-2000. I know this might sound crazy, but I stick with Alliant Powder exclusively, for no other reason than because I'm weird. I did notice that in an online burn chart, all four of those powders you mentioned have very similar burn rates to Reloader 10X:

    http://www.reloadersnest.com/burnrates.asp

  8. #8

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    358Win using 225gr bullets (which I think are optimum) and even with 250gr the following powders using magnum primers with compressed loads W748, Tac, H4895, Varget, IMR4895 with Tac and IMR4895 giving best velocities.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  9. #9

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    Quote Originally Posted by drow View Post
    Mainer, if you can find some, try Accurate 2015. Good old IMR 3031 works well, too.

    From Barnes Manual NO.1:

    BULLET________ POWDER___ START__ MAX
    180 gr X-bullet __ Acc 2015 __ 45.0 ___ 49.0 - 2875 fps
    200 gr X-bullet __ Acc 2015 __ 44.0 ___ 48.0 - 2794
    225 gr X-bullet __ Acc 2015 __ 41.0 ___ 45.0 - 2592
    250 gr X-bullet __ Acc 2015 __ 39.0 ___ 43.0 - 2415
    You will more than likely not reach these velocities listed in the Barnes Manual with those charges. You can always check out my comment by using a chronograph, I have used two of those loads using a 22" barrel and did not reach with those charges the above stated velocities.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

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