Got a mold

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  • Last Post 20 December 2019
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BigMan54 posted this 19 December 2019

I have a beat up Lyman #311332 2cav. One cavity has severe rust damage. Bullets come out with an added "lump" of metal about halfway up the bullet body. 

Bullets from the other cavity come out just fine.

Should I fill both cavities and just discard the bad castings or fill just the good cavity ? 

Thanks for your answers.

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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BudHyett posted this 19 December 2019

My thought is you have a one-cavity mold. With a known bad cavity, you are wasting time when you are filling and rejecting . 

Country boy from Western Illinois, living in the Magical Pacific Northwest

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BigMan54 posted this 19 December 2019

Was thinking about maintaining enough heat in the mold for proper fill out of the good cavity.

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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delmarskid posted this 19 December 2019

I fill one cavity when my mold is getting too hot. The empty side acts like a cooling fin on an air cooled engine.

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RicinYakima posted this 19 December 2019

I have a two cavity with on side converted to HP. When I need HP's, I don't even use the other one. Makes good bullets and works just fine.

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BudHyett posted this 20 December 2019

Was thinking about maintaining enough heat in the mold for proper fill out of the good cavity

Your casting pace, especially on an older smaller block size Lyman mold, will dictate the mold temperature and good production. You can regulate mold temperature by pot temperature and by casting pace. The energy flow will not be that different and will stabilize after ten casts. The empty hole drawing the heat may stabilize the energy flow better. Treat it as a single cavity mold. 

Country boy from Western Illinois, living in the Magical Pacific Northwest

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BigMan54 posted this 20 December 2019

Thanks Guys, Single Cavity it is.

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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