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Thread: 358 in 9mm

  1. #1
    Boolit Buddy nueces5's Avatar
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    358 in 9mm

    Hi everyone.
    like most, I have plenty of time to reload
    last week I got the mold that I am using now, MP 359-135 NLG, my first mp,
    PC with polyester powder paint
    I have two possibilities Read sizing die 356 and 358, it is to use in my G17 which slug in .3555
    I was planning to test the 358 boolits with light loads, 4grains out of 231


    Will it be a lot of diameter to use 358?

  2. #2
    Boolit Buddy
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    If we go with the .001” to .002” oversized theory. Then .357” would be about right. I have sanded out a few Lee sizers. A dowel, a bit of masking tape and a piece of 600 grit make quick work of it.

    JM

    P.s. I have run .0025” oversized without issue.

    P.s.s. Make sure they pass the “Plunk” test.
    Last edited by JM7.7x58; 04-02-2020 at 01:51 PM. Reason: Added plunk test

  3. #3
    Boolit Master Thumbcocker's Avatar
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    Use your barrel as a gauge to check the rounds. If .358 boolits will "plunk" in your barrel and feed from the magazine you are good to go. I size all my 9mm to .358.
    You'll go far providin' you ain't burnt alive or scalped."

    Will Geer as Bear Claw in "Jeramiah Johnson"

  4. #4
    Boolit Buddy
    EMR's Avatar
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    I size all of my 9mm to .358 as well. Though some of my pistols weren’t able to feed it. I just had the barrel throated instead of seating deeper

  5. #5
    Boolit Grand Master tazman's Avatar
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    Here is another current thread on the same topic. Lots of good information.
    http://castboolits.gunloads.com/show...oolits-for-9mm

  6. #6
    Boolit Buddy nueces5's Avatar
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    Thanks to all,
    when the quarantine ends, we will go to test them
    stay home

  7. #7
    Boolit Buddy Driver man's Avatar
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    I size my 9mm for cz75 and g34 to .358 .
    The Bird of Time has but a little way
    To fly-and Lo! the bird is on the wing

  8. #8
    Boolit Buddy nueces5's Avatar
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    Thanks Driver!

  9. #9
    Boolit Buddy Low Budget Shooter's Avatar
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    I use the .358 sizer for .380, .38 Special, .357 Magnum, and 9mm. Works great for all.
    A box of premium carry ammo is too expensive at about $30, so I've spent $1,000 on molds, lead, lube, primers, and powder over the past 10 years to make some that's cheaper!

  10. #10
    Boolit Master Ed_Shot's Avatar
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    Quote Originally Posted by Low Budget Shooter View Post
    I use the .358 sizer for .380, .38 Special, .357 Magnum, and 9mm. Works great for all.
    Same here.

  11. #11
    Boolit Master
    dale2242's Avatar
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    .358 for my 9MM here as well...dale

  12. #12
    Boolit Master bedbugbilly's Avatar
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    Load up some dummy rounds and try them to sees if they will chamber correctly and cycle in your particular pistol. All depends on your chamber and the plunk test will also tell you. I have had 9mm pistols where 358 work just fine - others only 357 would work.

  13. #13
    Boolit Buddy nueces5's Avatar
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    Plunk test and cycle correctly. Ask if is possible, More than anything, I was afraid it would raise the pressure a lot ...

  14. #14
    Boolit Grand Master tazman's Avatar
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    Unless your alloy is very hard, you can scratch the boolit with your fingernail. The extra thousandth or two will not raise the pressure and significant amount.

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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