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Thread: full bore .410 roundball mold ?

  1. #1
    Boolit Mold
    Join Date
    Apr 2021
    Posts
    4

    full bore .410 roundball mold ?

    Hi Gents

    What size mold would you get for a cylinder bore .410, with a barrel that is a true .410" ?
    Im looking at JT molds, and was thinking about a .411" mold, with cast pure lead.
    Thanks Dan

  2. #2
    Boolit Grand Master


    Join Date
    Apr 2017
    Location
    Aberdeen, South Dakota
    Posts
    7,136
    .415" at least. JT makes them to the cavity size, they drop slightly smaller than that. I'd order a .418" myself, and would expect it to drop a .415" ball plus or minus .002".

  3. #3
    Boolit Master trapper9260's Avatar
    Join Date
    Feb 2010
    Location
    Iowa
    Posts
    3,402
    What one are you use it in , a full choke or cylinder bore? You have 2 different choke size .
    Life Member of NRA,NTA,DAV ,ITA. Also member of FTA,CBA

  4. #4
    Boolit Mold
    Join Date
    Apr 2021
    Posts
    4
    Through a cylinder bore,Thanks

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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