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200 Grainers for .357--load data?

Discussion in 'Handloading and Reloading' started by Cosmoline, Dec 31, 2009.

  1. Cosmoline

    Cosmoline Well-Known Member

    I picked up some 200 grain Cast Performance slugs for the .357. I've got a little bit of data on them, suggesting 10 grains of 2400 or 6 grains of Unique. I'm inclined to give the 2400 a try but I'm posting to see if anyone else has worked up loads for these bullets.
  2. loadedround

    loadedround Well-Known Member

    Cosmo, I did some searching and have found the following reloading data in an older Alliant brochure. Loads are for 200 gr Lead bullets in the 357 mag:
    Unique 6.0 gr @1105 fps
    2400 10.0 gr @1245 fps

    38 Special:
    Unique 3.6 gr @780 fps
    2400 7.1 gr @890 fps (+P load)
    These loads are to be considered MAXIMUM loads and I suggest you back off 10% and work up. Hope this helps you out.
  3. Landric

    Landric Well-Known Member

    1245 fps seems pretty optimistic for 10 grains of 2400. I only got 862 fps with 9.5 grains and a 200 grain Lyman 358430 out of a 4" L-frame. 13 grains of 2400 got 1155 fps out of the same gun.
  4. Starter52

    Starter52 Well-Known Member

    6.0 Unique sounds like a good safe load in a .357 revolver.
  5. Cosmoline

    Cosmoline Well-Known Member

  6. _N4Z_

    _N4Z_ Well-Known Member

  7. Cosmoline

    Cosmoline Well-Known Member

    From the test N4Z posted:

    This is the third report I've seen of outstanding penetration from these CP 200's. Another account in the midway reviews reported penetration on par with a mid-weight .44 Mag. I may end up using them as my backup bear load.

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