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Thread: GP 100 Cast Bullet Diameter

  1. #1
    GunLoad Trainee
    Join Date
    Jul 2008
    Posts
    7

    Question GP 100 Cast Bullet Diameter

    All,

    I am new to bullet casting. I have been casting for my SRH .44 with great success, so now I am hooked.

    I have just bought a GP 100 and would like to know if any of you have any favorite bullet molds for this gun. I would also like any information on what sizing dia. I should start with etc. Basically, any information you are willing to share would be greatly appreciated. I am looking for loads for accuracy mostly. Thanks in advance.

  2. #2
    Gunload Grunt kg42's Avatar
    Join Date
    Nov 2005
    Location
    BC
    Posts
    510

    Default

    About 160gr lead, Unique or similar powder, with loads for 1000/1100fps (~6.5grs in 357 brass); 38+P loads with same powders work very well too.

    I would try as-cast first. GP100 seem to be fairly tight around 357, but a bigger bullet will give better neck tension so you won't work the brass with repeated crimpings.
    I hardly crimped with mine, for 357 homecast or 358 commercial bullets, but neck tension will depend on your dies.

    kg
    Last edited by kg42; 07-18-2008 at 03:36 AM.

  3. #3
    runfiverun runfiverun's Avatar
    Join Date
    Dec 2007
    Location
    soda springs idaho
    Posts
    657

    Default

    stick your calipers n the cylinder throats all of them and measure them
    at least .001 over that is good bigger is better.
    i shoot a 41 that i dont size in my black-hawk. just lube and load and give a bit of a squeeze with another size die to get them to load.

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BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
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HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
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LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
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