chamber cast;how to

hunter.b

September 04, 2016 07:33

How do you do a chamber cast?

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  nononsense

  September 04, 2016 07:40

  hunter.b,
  
  Here is the Brownells video:
  
  https://www.youtube.com/watch?v=DByaASz_HNk

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  rufe-snow

  September 04, 2016 07:54

  Be really careful, once the Bismuth compound has melted. It goes without saying, once it's liquefied it runs like water. Don't let it get away from you. Mask/protect every place you don't want it to go. I learned this the hard way. Don't even like to think about it.

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  navc130

  September 04, 2016 15:14

  I have read you can use Automotive Bondo or a hard wax to make a chamber cast. Wax may be difficult to measure accurately. Depends on what you are attempting to do. I have no experience doing it.

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  iceracerx

  September 04, 2016 20:08

  quote:Originally posted by navc130
  I have read you can use Automotive Bondo or a hard wax to make a chamber cast. Wax may be difficult to measure accurately. Depends on what you are attempting to do. I have no experience doing it.
  
  
  And Bondo (and other thermoplastics) shrink.

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  tapwater

  September 05, 2016 11:03

  ..If I search, I may have some cerrosafe that I'd give to you.
  That's the stuff to use, though I haven't done it myself....tap.

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  charliemeyer007

  September 05, 2016 12:36

  http://www.midwayusa.com/product/462291/midwayusa-chamber-casting-alloy-1-2-lb 1/2# $15
  
  http://www.brownells.com/gunsmith-tools-supplies/barrel-tools/barrel-chamfering-accessories/cerrosafe-chamber-casting-alloy-prod384.aspx
  
  1# $46 1/2# $25

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  gunnut505

  September 10, 2016 07:20

  I used a finger from a latex glove, filled it with plaster & waited 3 hours.
  Pulled right back out & was identical to the chamber dimensions given for the 7.62X54R I got from my Mosin book. Also showed a slight "seam" about an inch back from the barrel. Must have been used HARD by the Rooskies!

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