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Thread: MP Mold "640"...What is it?

  1. 09-11-2021, 04:30 PM #1
    Stopsign32v
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    MP Mold "640"...What is it?

    So what are these "640" molds MP has? And why isn't the 359-640 not as popular as some other molds?
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  2. 09-11-2021, 04:59 PM #2
    BK7saum
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    The 640 molds are a round nose flat point or wide flat nose / hollow point mold. the nose profile is the same on all the 640s. As far as popularity, they vary in weight and diameter depending on the specs of the mold.
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  3. 09-11-2021, 08:30 PM #3
    Mal Paso
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    It's the Lyman Devastator often without the gas check which most don't need at the speeds that hollowpoints are effective.
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    Last edited by Mal Paso; 09-12-2021 at 09:20 AM.
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  4. 09-11-2021, 10:22 PM #4
    Iwsbull
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    I have 3 different calibers in the 640 mold they are all very accurate bullets. The ones I have are the 44, 45 and the 480/475 and as soon as another run is made I will have one for my 500 Linebaugh. With the large hp pin installed they have a gaping cavity at the business end.
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  5. 09-12-2021, 07:24 AM #5
    USSR
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    The business end of the 359-640.

    Don

    Click image for larger version.  Name: Hollowpoint Testing.jpg  Views: 17  Size: 73.7 KB  ID: 288561
    NRA Certified Metallic Cartridge Reloading Instructor
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  6. 09-12-2021, 08:53 AM #6
    JonB_in_Glencoe
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    640 is a lyman part number

    https://www.midwayusa.com/product/101022244
    ~~~~~~~~~~~~~~
    “If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun.”
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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