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Author Topic: 30-30 brass resizing  (Read 701 times)

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Offline Pass Lake

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30-30 brass resizing
« on: January 19, 2012, 02:06:39 PM »
There is plenty of 30-30 brass around and I am looking to save some money on reloading for my Marlin .375.  Is it possible to re-size 30-30 brass to use in my .375?  .375 Winchester brass has become awfully expensive to buy.  I am appreciative of your responses.
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Offline cjrjck

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Re: 30-30 brass resizing
« Reply #1 on: January 19, 2012, 03:18:25 PM »
Forming and then fireforming  the 375 cases from the 30-30 should be easy to do but I doubt the 30-30 cases are strong enough for the pressures at which the 375 operate. If you plan to shoot only low pressure cast loads it might be okay.
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Offline keith44

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Re: 30-30 brass resizing
« Reply #2 on: January 19, 2012, 04:58:19 PM »
The necking up that much sounds like you may end up splitting the necks prematurely to me.
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Offline gypsyman

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Re: 30-30 brass resizing
« Reply #3 on: January 19, 2012, 06:50:58 PM »
Been doing it for years. Redding makes an expander ball that push's the 30-30 back out to .375.(Remember, 30-30 started out life as .375, and was necked down to 30 cal.) I make brass for my .375 super mag DW, and for my .375 Win. big bore from 30-30. gypsyman
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Offline Pass Lake

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Re: 30-30 brass resizing
« Reply #4 on: January 23, 2012, 01:29:42 PM »
I appreciate your replies.  Over the weekend I tried to load some .377 cast bullets in resized 30-30 brass without success.  I figured that I needed to stretch the brass incrementally, so I first ran 30-30 brass first thru an 8 mm die, than a .35 Rem die and lastly fireformed it to .375.  The brass mouth was then uneven so I trimmed the brass .  I used an RCBS .375 Win die to seat the bullet but it wouldn't crimp.  After widening the mouth to .375 the brass now measured shorter.  It appears it was too short to crimp properly.
 
Gypsyman, is the Redding die shorter so it will seat the bullet?  Or is there something else that I should be doing? 
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Offline cwlongshot

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Re: 30-30 brass resizing
« Reply #5 on: January 23, 2012, 03:31:43 PM »
You are correct, 30-30 brass for the 375Win is fine. BUT its powder capacity will be slightly more as the 375 brass is thicker. So loadings should be adjusted.
 
Also as you have found the brass will be too short, and many times not even requiring trimming further shortening it.
 
CW
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Offline Flash

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Re: 30-30 brass resizing
« Reply #6 on: January 24, 2012, 12:39:15 PM »
I did it for a Contender but with medium cast loads and it worked fine. I had an hour glass appearance in the cases until they were fire-formed but the necks didn't split. I used Imperial Sizing Die Wax to neck them up and never lost a case.
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