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Oldbee
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Fire forming cases
May 17th, 2022 at 8:34pm
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I am making 32-40 Win out of 38-55 cases.  I have a few made and they are ready to fire form.
What type of powder charge should I be using?  Would 50% of a minimum charge work?
Thanks
  
Seabee's, Danang, Chu Lai, Khe Sanh, 1966 -1968
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Cbashooter
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Re: Fire forming cases
Reply #1 - May 17th, 2022 at 8:49pm
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The case should be pretty close if die formed.
Standard schuetzen loads will be fine.
  
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Oldman1950
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Re: Fire forming cases
Reply #2 - May 17th, 2022 at 8:57pm
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I have made 32-40 out of 32 Winchester Special. I ran it thru the 32-40 die and then loaded it with 10 gr. of 700x (shotgun powder) and the rest of the case filled with Cream Of Wheat topped with a foam wad. The cases worked fine.

A. J. Palik
  
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Skalkaho
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Re: Fire forming cases
Reply #3 - May 18th, 2022 at 4:55pm
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Just flare the case mouth A little so it scratches going in chamber.That'll fireform it out.I like to anneal the case first,that will really make em fit the chamber and your done.14.0 gr 4227
  
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Oldbee
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Re: Fire forming cases
Reply #4 - May 19th, 2022 at 8:00am
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Thanks for the replies!  I now have an idea of where I should be on the powder charge.
  
Seabee's, Danang, Chu Lai, Khe Sanh, 1966 -1968
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