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Old December 16, 2007, 10:38 PM   #1
kawasakifreak77
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New here, wildcat question.

Hello all, I've been doing some dig'n around & have come up short. Has there ever been a 45/70 necked down to 30 caliber? And where could I find a list of 45/70 based wildcats at? Thanks in advance for any help!
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Old December 17, 2007, 01:45 PM   #2
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I can't think of one off of the top of my head but one that would be close is the .309 JDJ based on a necked down .444 Marlin case.
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Old December 17, 2007, 04:52 PM   #3
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I have seen wildcats based on 45-70 necked to .439", .429", .416", .410", and .375". All were chambered in single shot rifles. There were also LOTS of factory chamberings based on 45-70 head size about 100 years ago. They perform well, but one problem you start to run into is the strength of the case.
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Old December 17, 2007, 08:48 PM   #4
kawasakifreak77
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I've been think'n about this for awhile now. Would it be possible to neck down the 45/70 case & use a sharp (around 40) degree neck angle? If so who would I contact to make dies/reamers? Thanks everyone!
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Old December 17, 2007, 09:02 PM   #5
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RCBS will make the dies, and Clymer will make the reamer. Just bear in mind that the 45/70 case has a pressure ceiling of about 38000 cup. You might want to try the 450 Marlin case.
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Old December 17, 2007, 11:10 PM   #6
Jim Watson
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If it has been done, neither Ackley or Donnelly shows it.

The big rimmed wildcats like that are normally done on the stronger .348 brass.

Although if you neck down .45-70 to .338" you will have what Winchester called the .33 WCF.
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Old December 17, 2007, 11:51 PM   #7
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Would this be similar in size and shape to the .307win? I think that one is/was a rimmed .308.
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Old December 22, 2007, 10:53 AM   #8
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'They perform well, but one problem you start to run into is the strength of the case.'

That is a fallacy. Modern .45-70 brass is as strong as any other standard caliber (.25-06, .270, .308, etc). I was told that by the people at Winchester at least 15 years ago.
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Old December 22, 2007, 01:24 PM   #9
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As I said earlier, there are a number of wildcats based on 45-70. In Cartridges of the World, they show the .416 Barnes, and the 45 Silhouette, both based on the 45-70. Just pick your caliber, decide how long you want the neck to be and the shoulder angle. The folks at RCBS can help you with dies and reamers. Wildcatting can be a lot of fun. However, I can tell you from personal experience that it is easier to use someone else's design, since they usually have load data developed already.
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