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Thread: New RCBS Iron Mold Tinning. How to Clean?

  1. #1
    Boolit Bub
    Join Date
    Jan 2021
    Location
    Southern California
    Posts
    46

    New RCBS Iron Mold Tinning. How to Clean?

    Hello Guys,

    Casted a few hundred rounds from my brand-new RCBS mold. I noticed tinning (or lead sticking) on one side of the mold half on the corner of the lube groove.

    I tried using a bamboo skewer to pick the sticky metal out, applying some 2-cycle oil then wiping with a terrycloth, and using a torch, but no luck.

    I didn't want to use the torch too long because I don't want to warp the mold.

    Any suggestions on how to remove this tinning and how to prevent this from further occuring?

    Thanks in advance!

  2. #2
    Boolit Master
    winelover's Avatar
    Join Date
    Apr 2009
    Location
    North Central Arkansas
    Posts
    2,403
    Four ought steel or bronze wool will not hurt an iron mould.

    Winelover

  3. #3
    Boolit Buddy
    Join Date
    Dec 2017
    Posts
    109
    I use the chore boy brass wrapped around an old pistol bore brush and it works a treat

    Good luck and cheers

  4. #4
    Boolit Master


    Join Date
    Apr 2005
    Location
    Eastern South Dakota
    Posts
    3,662
    A small brass bristle brush is what I use. Beware: there are brass-colored bristle brushes that have steel wires.

    If the lead is sticky right on the edge of the mould it could be that there is a small burr there. Strong light and a good magnifying glass might spot it if so. Depending, a razor knife with a new blade might get it. I've had moulds that had the tiniest ring of steel around the very top edge of the cavity and the razor knife did the trick.

    Welcome to the forum.


    Cat
    Cogito, ergo armatum sum.

    (I think, therefore I'm armed.)

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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