close

Privacy guaranteed - Your email is not shared with anyone.

MODERN RELOADING data for 9mm lead vs jacketed

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

  1. cowboy1964

    cowboy1964

    Joined:
    Sep 4, 2009
    Messages:
    22,173
    Likes Received:
    3,859
    Location:
    U.S.A.
    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

    Joined:
    Jun 12, 2002
    Messages:
    11,682
    Likes Received:
    3
    Location:
    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. skselby

    skselby

    Joined:
    Nov 4, 2010
    Messages:
    22
    Likes Received:
    0
    Location:
    Centennial, Colorado
    Nevermind, wrong thread.
     
    Last edited: Mar 31, 2011
  4. fredj338

    fredj338

    Joined:
    Dec 22, 2004
    Messages:
    23,871
    Likes Received:
    2,414
    Location:
    so.cal.
    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 2 Timothy 2:15

    Joined:
    Aug 28, 2008
    Messages:
    21,973
    Likes Received:
    7,066
    Location:
    Must Be Texas

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

    fredj338

    Joined:
    Dec 22, 2004
    Messages:
    23,871
    Likes Received:
    2,414
    Location:
    so.cal.
    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.