Load Subsonic Ammunition

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Thread: Load Subsonic Ammunition

  1. #1
    VIP Member Array mlr1m's Avatar
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    Load Subsonic Ammunition

    I found this page in my searching for good calibers for a silenced rifle. Interesting read. Hit the back buttun on the bottom of the page for more articles on the subject.
    Develop Subsonic

    The goal of this article is to explain techniques used to safely develop and load subsonic ammunition without risking life and limb.
    Michael

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  3. #2
    Senior Member Array Ring's Avatar
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    Cartridge Loads - Hodgdon Reloading Data Center - data.hodgdon.com



    Cartridge: 308 Winchester
    Load Type: Rifle
    Starting Loads
    Maximum Loads

    Bullet Weight (Gr.) Manufacturer Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
    150 GR. NOS BT IMR Trail Boss .308" 2.800" 10.0 1176 25,800 PSI 14.0 1417 27,100 PSI





    Cartridge: 308 Winchester
    Load Type: Rifle
    Starting Loads
    Maximum Loads

    Bullet Weight (Gr.) Manufacturer Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
    168 GR. SIE HPBT Hodgdon Titegroup .308" 2.800" 8.0 1080 25,000 CUP




    Cartridge: 308 Winchester
    Load Type: Rifle
    Starting Loads
    Maximum Loads

    Bullet Weight (Gr.) Manufacturer Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
    168 GR. SIE HPBT Hodgdon Clays .308" 2.800" 8.0 1060 26,800 CUP

  4. #3
    Senior Moderator
    Array HotGuns's Avatar
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    That first article is outdated. Back when subsonics were strictly a handloading proposition, in some cases drilling out the primer holes was the way to go.

    Since then, it is no longer needed. Also, several high load density, low power powders have been developed such as Trailboss.

    The problem with Trailboss is that sometimes the speed of the bullet is too slow even with a full case.

    Much of the .50 Hush Puppy (a relativley new round) that I developed specifically for suppressed .50 HP rifles is with Trailboss.It was the only suitable powder that gave good load density,speed and accuracy shooting a .50 515 cast bullet that sounds about like a pop gun.

    Its the hog killingest machine out there.
    I would rather stand against the cannons of the wicked than against the prayers of the righteous.


    AR. CHL Instr. 07/02 FFL
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  5. #4
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    If I was looking for a suppressed CF rifle round, I'd be looking at big calibers, like the J.D. Jones 'Whisper' series or the .450 Bushmaster. With subsonic rounds you give up all the advantages of high velocity, but larger diameter, heavy bullets make up for those losses with deep penetration and big vent holes.
    Smitty
    NRA Endowment Member

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