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MODERN RELOADING data for 9mm lead vs jacketed

Discussion in 'Reloading' started by cowboy1964, Mar 31, 2011.

  1. cowboy1964


    Sep 4, 2009
    I thought, in general, lead requires less powder than jacketed for the same bullet weight? So why does that book show the following:

    124gr jacketed
    Unique 4.8 - 4.9

    125gr lead
    Unique 5.3 - 5.5

    For other powders the min/max seem to be mostly the same (within .1). Why is Unique, uh, unique?

    BTW, does anyone know if the powders are sorted in any particular way in that book under each bullet? They just seem to be in random order as far as I can tell.
    Last edited: Mar 31, 2011
  2. WiskyT

    WiskyT Malcontent

    Jun 12, 2002
    North Carolina
    Lee gets his data from other sources. So the lead bulet load is likely from one source, and the jacketed from another. The real question is why do different sources have such different charge weights if the system used to measure pressure is scientific and therefore repeatable?

    Lee does list powders in a specific order, but I don't remember what criteria he uses. It's velocity, or case volume or something like that.

  3. Nevermind, wrong thread.
    Last edited: Mar 31, 2011
  4. fredj338


    Dec 22, 2004
    Just another example of why the LEE "manual" is really poorly done. What lead bullet, what jacketed bullet, OAL, etc. Typically, lead bullets run the same vel & pressures as jacketed w/ slightly lower powder charrges, always. At elast I have never seen them not & I load lead bullets for every handgun round.
  5. JBnTX

    JBnTX Bible Thumper

    Aug 28, 2008
    Fort Worth Texas

    How does lead work out for you in the 9mm?
    I'm thinking of switching to a hard cast 125gr bullet.
  6. fredj338


    Dec 22, 2004
    The 9m & 40 are probably the most diff to get great reults out of. It can be done, it just may take a bit more effort. Casting your own will help as you can control the many variables. Start w/ a 0.356" dia LTC & medium burner like WSF or Unique. IME, if a gun won't shoot lead bullets o/ Unique, it probably won't shoot lead bullets.