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Bob259
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Making 32 miller Short cases
Oct 8th, 2025 at 12:29pm
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Ok, I was able to get some 357 max brass but how much do they grow after forming from 357 max cases, what should I cut them down to before forming them so they are at the correct length after forming.
Thanks in advance!
  
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gnoahhh
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Re: Making 32 miller Short cases
Reply #1 - Oct 8th, 2025 at 1:59pm
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To make .32 Miller Shorts I just use .357 Mag brass, one pass in and out of the swaging die and done, no trimming. Is there a reason for using .357 Max brass that I'm unaware of?
  
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bnice
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Re: Making 32 miller Short cases
Reply #2 - Oct 9th, 2025 at 2:58pm
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heavier web that hold up better under heavier loads.
  
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MrTipUp
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Re: Making 32 miller Short cases
Reply #3 - Oct 9th, 2025 at 8:17pm
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what should I cut them (357 Max cases) down to before forming them so they are at the correct length after?

Since you're going to have to trim them, why not do so after they're formed to insure accuracy?

Bill Lawrence
  
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gnoahhh
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Re: Making 32 miller Short cases
Reply #4 - Oct 9th, 2025 at 8:33pm
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bnice wrote on Oct 9th, 2025 at 2:58pm:
heavier web that hold up better under heavier loads.


Ok, but .357 Mag brass is designed for pretty egregious pressure regardless. Methinks the Max brass with its heavier web = less case volume = more pressure as a result with equal loads, compared to regular Mag brass. Kinda self defeating?

I concede your point but can't help but feel Max brass is borderline superfluous as I'm not running high pressures. Maybe a greater benefit in terms of longer case life, but on the other hand I have a small mountain of .357 Magnum brass...
  
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Bob259
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Re: Making 32 miller Short cases
Reply #5 - Oct 10th, 2025 at 12:18pm
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gnoahhh wrote on Oct 8th, 2025 at 1:59pm:
To make .32 Miller Shorts I just use .357 Mag brass, one pass in and out of the swaging die and done, no trimming. Is there a reason for using .357 Max brass that I'm unaware of?


That’s what all the ones I got from Buffalo Arms were made from so these are what I ordered. Getting cut down, but they will stretch after forming so I’d like to trim short before I form them and have them at the correct length.
  
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calledflyer
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Re: Making 32 miller Short cases
Reply #6 - Oct 10th, 2025 at 12:27pm
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OK, then, don't take the advice offered more than once about forming prior to final trim. Use your own way and find out that you have cases either longer or shorter than your guess using an unformed trim length. And make no mistake that's what it is: a guess.
  
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bnice
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Re: Making 32 miller Short cases
Reply #7 - Oct 11th, 2025 at 7:18am
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Also since I establish my load with max and not mag and don’t mix them with mag brass  I guess your point means less powder. Never same load. Hotter loads 1475-1500 fps. Better case life
  
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