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Thread: What size should my bullet be?

  1. #1
    Boolit Buddy

    rockydoc's Avatar
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    What size should my bullet be?

    I have a new Miroku/Winchester M1892 357 Mag/38 Spl.
    A pounded cast of the Chamber/Throat gives a ball seat diameter of .379". Groove diameter of .356".
    Pin gages ( Minus .0002" gages) in the muzzle= .346" go, .347" no go.

    I am about to order a mold. What size bullets should it throw?
    NRA Lifetime member since 1956, NRA Endowment Member. Reloading since 1954. CBA Member Navy Vietnam Veteran USS Intrepid CVA 11

  2. #2
    Super Moderator

    Preacher Jim's Avatar
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    Rocky I would order .357 if it's .356. Some would say .358 but I error on the side of caution with your pin guage.

  3. #3
    Boolit Buddy

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    I may have misidentified the "ball seat diameter" There is a section .058" long and .379" in diameter from the case neck to the tapered section, which is .096" long, tapering to the groove diameter of .356". There may be no "ball seat". This may be an extension of neck diameter.

    rockydoc
    NRA Lifetime member since 1956, NRA Endowment Member. Reloading since 1954. CBA Member Navy Vietnam Veteran USS Intrepid CVA 11

  4. #4
    Boolit Master Outpost75's Avatar
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    Shoot the largest bullet which chambers without resistance. Read last section of the sticky.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

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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