.401" and .400" just for sizing down jacketed bullets. If you sized down jacketed bullets too much at once the jacket springs back and separates from the core.
I make "Magnum" bullets all the time for my 38-40s and 401 GNR.
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SRH 10mm Magnum - My first go with this cartridge...
- Huey, 2020-12-03, 12:27
![[*]](themes/default/images/complete_thread.png "Open whole thread")
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you want some 10MM Mag load data I worked
- Sean Harper, 2020-12-03, 13:38
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Sean, would love to have it... (nm)
- Huey, 2020-12-03, 14:17
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Sent (nm)
- Sean Harper, 2020-12-03, 14:45
- Got it, Thanks... (nm) - Huey, 2020-12-03, 14:57
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Sent (nm)
- Sean Harper, 2020-12-03, 14:45
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Sean, If you like to post it, I have and interest. (nm)
- BlackPete, 2020-12-03, 13:41
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It is a LOT of loads. I had Andy Rowes 10MM Mag for a
- Sean Harper, 2020-12-03, 13:51
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It’s just the rimless old Herters .401. What the .41 should
- WB, 2020-12-03, 16:59
- I had Lee build me custom sizer dies in .405"... - Huey, 2020-12-03, 17:23
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It’s just the rimless old Herters .401. What the .41 should
- WB, 2020-12-03, 16:59
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It is a LOT of loads. I had Andy Rowes 10MM Mag for a
- Sean Harper, 2020-12-03, 13:51
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Sean, would love to have it... (nm)
- Huey, 2020-12-03, 14:17
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you want some 10MM Mag load data I worked
- Sean Harper, 2020-12-03, 13:38