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.357 Speer TMJ

Discussion in 'Handloading and Reloading' started by GuitarsAndGuns, Jun 10, 2012.

  1. GuitarsAndGuns

    GuitarsAndGuns New Member

    Apr 4, 2010
    I picked up some Speer 158 Grain TMJ from my local store the other day. The problem is I can't find any loading data for them. I currently only have the Lyman manual, and Speer doesn't seem to have any data online, nor do the powder manufacturers I am using right now. Can I use the data for a 158 jacketed hollow point? Should I back off some on the charge? I currently have W231, Red Dot, Titegroup, 2400, Unique, and Accurate #5. I am trying to find loads for .357 and .38 Special. Any help will be very much appreciated. Sorry if this is a silly question, but I haven't run into this issue until now. I will likely pick up the Speer manual if I like these, as a store in my area carries lots of their bullets, but I wanted to try some first. Thanks.

    Last edited: Jun 10, 2012
  2. BBDartCA

    BBDartCA Active Member

    Jul 7, 2011
    The current Loadbook has the data from Speer for that TMJ part number

    W231, Red Dot, Titegroup, 2400, Unique, and Accurate #5.

    Of the powders you have, here is what they have published ... uh just AA#5 (9.0-10.0g giving 1032 to 1152 FPS). Those seem to be fast powders for 357 158g. They have data for 2400, n110, h110, blue dot, 296, aa#7, AA#9 (my fave), IMR 4227 (my other fave for this bullet), power pistol, n350, hs-7, hs-6, unique, universal.

  3. gamestalker

    gamestalker member

    Sep 10, 2008
    SW Arizona
    I have the .357 mag. "One Book, One Caliber" and Speer indicates the same data for TMJ Part #4207, as for JHP, JSP, and Gold Dot. A jacketed bullet is a jacketed bullet. The only time things change regarding data, is when using plated or non jacketed bullets.

  4. Josh45

    Josh45 Participating Member

    Jan 22, 2011
    You can use the hollowpoint data for your TMJ rounds. I have plenty of times.
    Use the cannelure to set your OAL. If I am not mistaken, Being a TMJ round rather than a HP bullet, Your OAL would more than likely be longer than what you see in your book which is no big deal.

    2400 is pretty good in .357 Magnum
    I like W-231 for .38 Special.

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