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Old October 9, 2011, 08:13 PM   #1
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WST start load for 357Sig? Or...similar comparable powder to WST for comparison?

Hi all,

I have a surplus of Winchester Super Target. I want to use it. And I like it.

I am loading 125gr 357Sig, copper hollowpoit bullets, probably load them long at 1.2" because they feed fine, to reduce chamber pressure if needed and to give an extra-solid crimp on the neck.

Can anyone give me a starting powder weight for this load? I do not have a chrony but I thought I would slowly load up until it felt right and hit where it should, watching for any signs of high pressure.

Thank you!
"No honest man needs more than 10 rounds in any gun."
"I never meant for simple civilians to have my 20 or 30 round magazines or my folding stock."
"I see nothing wrong with waiting periods."

- Bill RUGER to Tom Brokaw on NBC News, while pushing for the 'high capacity' magazine ban

Last edited by jdthaddeus; October 10, 2011 at 08:24 PM.
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Old October 10, 2011, 08:33 PM   #2
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Join Date: November 20, 1999
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Here is a link to Winchester and Hodgon load data if that helps narrow it down:

They give data for Longshot, HS-6, Universal, 800-X, SR4756 and SR7625. I have not used any of those powders...are any of them comparable in any way to WST so I can use the data to calculate a starting load?

Or, could I use the load data for .40 with WST to estimate a starting load weight? 135gr .40 uses 5.5gr WST as a start load. Somehow if I could calculate for the difference in bullet mass (135gr vs 125gr), and account for any case volume difference, I could estimate a 357Sig low-end start weight.


Last edited by jdthaddeus; October 10, 2011 at 08:52 PM.
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