9mm cast bullet loads

Discussion in 'Ammunition & Reloading' started by dmbeck97, Jan 16, 2013.

  1. dmbeck97

    dmbeck97 New Member

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    I'm trying to find a load for my 9mm 125gr cast rn with IMR SR-4756. I've looked everywhere and can't find anything. Plz help!
     
  2. DaTexanBoy

    DaTexanBoy New Member

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    Have you tried imrpowder.com? If not, you may want to give it a try. They should have that specific powder in there. It's worth a shot at least.
     

  3. Shade

    Shade New Member

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    Hodgdon owns IMR (DuPont) and Winchester powders now.

    http://data.hodgdon.com/main_menu.asp

    Is a better link.

    Bullet Weight (Gr.) Manufacturer Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
    125 GR. LCN ........... IMR SR 4756 ............. .356" 1.125" 4.2 972 24,400 PSI ... 4.8 1071 30,200 PSI
     
    Last edited: Jan 16, 2013
  4. dmbeck97

    dmbeck97 New Member

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    I can only find a load for 125gr lcn would that still be the same load for lrn?
     
  5. Shade

    Shade New Member

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    LCN is lead conical nose, LRN is lead round nose.

    Start at the starting load of 4.2 grain, like you should anyway, and work
    your load up as you see fit.
     
  6. dmbeck97

    dmbeck97 New Member

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    ok I'll try that
     
  7. dmbeck97

    dmbeck97 New Member

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    Range report: I took out my 9mm and the gun did not blow up even with the 4.8gr but from 4.2-4.8 the all keyholed and I have no idea why. Anybody know how to stop that?
     
  8. res45

    res45 New Member

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    Well you could be putting to much taper crimp on the bullet and squeezing the bullet down to where it doesn't fit the bore properly anymore or In my case I found that casting my own bullets and sizing them to .358" took care of the keyholing issue. Some 9mm handguns just like a fatter bullet.
     
  9. Rick1967

    Rick1967 Well-Known Member

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    +1 on the crimping issue. I did that once with a 45acp. It can definately cause it.
     
  10. nitestalker

    nitestalker New Member

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    The bullets are not filling the chamber throat. Lead bullet loads are based on presssures measured in CUPs. The correct diameter for a cast 9MM should run .001" over a nominal of .355" to a .356".
    Bullets that run a high Brennel or BHN needs higher pressure to up set and fill the throat. If you are runing a low BHN 5 to 6 you can use these lower pressure loads. Loading a BHN of 12 to 20 the loads should run much higher pressures. :)
     
    Last edited: Jan 19, 2013
  11. dmbeck97

    dmbeck97 New Member

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    Here's the measurement on them I don't think I'm crimping them it just seats them and gets rid of the bell

    ForumRunnerImage.jpg
     
  12. nitestalker

    nitestalker New Member

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    I can not see the face on your caliper? You only taper crimp the 9MM. Have you slugged the bore in your pistol?
     
  13. nitestalker

    nitestalker New Member

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    I can not see the face on the caliper? The last number looks in correct is your dial centered and locked?
     
  14. dmbeck97

    dmbeck97 New Member

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    I'm fairly new to loading I don't know what slugging my barrel is