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Thread: Has anyone tested MP HP bullets for expansion?

  1. #1
    Boolit Buddy
    Join Date
    Jan 2021

    Has anyone tested MP HP bullets for expansion?

    Has anyone tested MP HP bullets? hat type of bullet were you using, what ratio of lead:tin:antinomy did you use, what powder did you use, what was the MV, and what medium you used?

  2. #2
    Boolit Master Recycled bullet's Avatar
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    Oct 2022
    Suburbs south of dc
    Quote Originally Posted by BJung View Post
    Has anyone tested MP HP bullets? hat type of bullet were you using, what ratio of lead:tin:antinomy did you use, what powder did you use, what was the MV, and what medium you used?
    I shot the MP359 Hammer bullets. My Bullets weigh 155 grains cast from a 4 cavity brass mold with the deepest hollow point pins installed, made of 90 / 5 / 5 alloy, powder coated light blue, sized with a Lee 357 push thru sizer. I loaded in 357 Magnum Starline brass with 16.5 grains of H110 shot through a 6.5 inch Ruger Blackhawk at steel plates. I was unable to locate bullet fragments. Those bullets were getting there real quick. I do not know the velocity.

  3. #3
    Boolit Master
    pipehand's Avatar
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    Apr 2007
    South Carolina Sandhills
    I'm shooting the same Hamer boolits, with the Penta pin hp's. Only I'm using a softer alloy at 1200fps or so. I havent checked them for expansion, as I havent come up with a suitable testing media.
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  4. #4
    Boolit Master
    jdgabbard's Avatar
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    Sep 2008
    Tulsa, Oklahoma
    Ask and you will receive...

    Pistol Caliber examples of HP testing:

    Rifle Caliber Examples in this thread:

    That should be a pretty good start for you to answer your own questions.
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  5. #5
    Boolit Grand Master Tripplebeards's Avatar
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    Apr 2017
    If you look at some of my old posts, I’ve had good luck and bad luck, depending on what alloy I use. I use 10.5 BH 50-50 clip on wheel weights and pure in my 35 Remington at 2100 ft./s and it puts fist size holes in and out of ribs on deer and drop them in their tracks. I’ve also tried 15.4 BH out of my 44 magnum rifle was zero expansion at 1750 ft./s. It was like shooting deer with an arrow with a field point or FMJ. Soft alloy, gas checks, and power coating with the softest alloy your gun will shoot accurately is the key to good expansion. I’ve switched to 40 to one in my rifle for the 44 magnum but yet they have a deer walk by during our antlerless only hunt to test it on. I’m sure it will expand very nicely at 1600 ft./s which I have it loaded at. I use the deep round pin in the .35 cal MP mold.

  6. #6
    Boolit Grand Master fredj338's Avatar
    Join Date
    Feb 2009
    For my LHP I go 20-1 lead/tin for bullets 1000-1300fps. For under 1000fps, 25-1 seems to work well. HP designs can be all over the place though.
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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