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Thread: herco in 9mm

  1. #1
    Boolit Buddy
    Join Date
    May 2013
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    351

    herco in 9mm

    I came across a note I had written in one of my reloading books on the 9mm parabellum page
    115 gr. 6.5gr herco 1.09" col

    after reading what Mr Gibson came up with on the overpressure book loads with old green dot data I'm wondering how safe this old load data is for herco

  2. #2
    Boolit Master
    farmerjim's Avatar
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    I use 6.2 grains of herco with the lee 358-125-RF sized .357 in 9mm. I have shot thousands of them with no problems.
    Last edited by farmerjim; 08-02-2020 at 06:25 AM.
    There is no difference between communism and socialism, except in the means of achieving the same ultimate end: communism proposes to enslave men by force, socialism—by vote. It is merely the difference between murder and suicide. Ayn Rand

  3. #3
    Boolit Grand Master


    Larry Gibson's Avatar
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    Quote Originally Posted by farmbif View Post
    I came across a note I had written in one of my reloading books on the 9mm parabellum page
    115 gr. 6.5gr herco 1.09" col

    after reading what Mr Gibson came up with on the overpressure book loads with old green dot data I'm wondering how safe this old load data is for herco
    That is a top end 9mm load and ok but I suggest working up to it in your pistol. I use 7.0 gr Herco under a 115 gr Gold Dot for a +P load in my CZ75. Runs 1350 fps. I got the load back in '89 from a "Taffin Tests" article in the Handloader magazine. I don't shoot many of them, just enough to ensure reliable function and expansion. Also use this load with the Hornady 115 XTP HP bullet. Both very accurate and dependable. I save them for potential serious social encounters. I have since pressure tested the load and it is right up at the top end of SAAMI +P psi MAP (38,500 PSI).
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  4. #4
    Boolit Master
    Join Date
    Dec 2007
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    816
    I had good results with Herco in 9mm pistols using a variety of cast bullets, but it's been a long time ago. Most, maybe all of the loads were with lighter bullets in the 110-125 grain range. I've since gone to a 150 grain round nose for all 9mm loads and don't recall trying Herco with that bullet. Herco is a good powder for many handgun cartridges, but it's seldom mentioned these days.

  5. #5
    Moderator Emeritus


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    I had loaded some 9mm with Herco data in the 90's. I shot 2 through the Chronograph and the rest through a Blackhawk. My suggested data was 100 fps higher than what was listed for jacketed. I did scrub a little lead but nothing heavy.
    [The Montana Gianni] Front sight and squeeze

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check