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Thread: Expanding a boolit mould the "WEET" method. (In parts)

  1. #61
    Boolit Master
    Join Date
    Jan 2018
    Location
    North Central
    Posts
    2,514
    I have an RCBS 250K mold that drops at .430" It worked fine when I then powder coated the boolits but I have since gotten a lube sizer and now the mold needs to be enlarged a couple thousandths. This thread should help get the job done. Thanks!

  2. #62
    Boolit Grand Master

    Join Date
    May 2005
    Location
    Castlegar, B.C., Canada
    Posts
    7,933
    The cheapest, easiest way I know is to Beagle it.

    Do a search, there are lots of posts and should be a sticky.

    Next is to lap the mould. Lapping just a couple thou is fairly easy but much beyond is work... at least with an iron mould. There are stickies on lapping too.

    Longbow

  3. #63
    Boolit Master

    Join Date
    Oct 2013
    Location
    JAX, FL
    Posts
    1,228
    Quote Originally Posted by kens View Post
    How did you find the center to drill for the bolt?
    an old post but never answered. to find the center, with a bullet in the cavity line up a straight edge along the two mold halves and scribe a short line near center with a zacto knife. Open mold and rotate bullet 1/4 turn and scribe another line along the the axis of the mold halves. The X is the exact center of the bullet or close enough for what we are doing.
    Last edited by oley55; 08-20-2022 at 11:23 PM.
    “Some people spend an entire lifetime wondering if they made a difference in the world. But, the Marines don't have that problem.” Ronald Reagan


  4. #64
    Boolit Buddy
    Join Date
    Feb 2013
    Location
    Willamina, OR
    Posts
    220
    I have an old Lee single cavity .309" mold that I can't wait to try this on. Awhile back I had a .44 mag Handirifle with an over sized bore that I tried to lapping out a mold for. I bought a .429 RN Lee mold on sale and proceeded to lap it out. I ended up only enlarging it .0005" but is it ever shiny and it drops really pretty boolits... I sold that .44 barrel and now I shoot those boolits out of my old Ruger Blackhawk...

    Tony
    Hi, my name is Tony and I'm addicted to gunpowder.

    AKA Geezerbiker

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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