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reforming brass

Rochelle
Does any one know of a sight that has instruction on how to reform brass from a smaller case to a larger.. I haven't done any in 45 years and the mind is a little foggy.
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  • Rochelle
    I have been reloading close to 45 years now, rifle, pistol and have dabbled a little with shotgun, but I have never reformed brass before. I acquired some Winchester 8x57mm brass and would like to size it down to 7x57mm. Use to be able to buy Winchester brass in 7x57mm but I don't think they make it anymore. I don't know if just trying to run 8x57mm through my 7x57mm die will work, I don't want to get a case stuck, so I thought I would ask if anyone tried this before? Dimension wise the cases are about the same, also these are brand new cases so brass should be fairly soft.
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  • Tailgunner1954
    From what to what?
    30-06 to 338-06 or 35 Whelen is a simple "neck up", while 30-06 to 30 Gibbs is a bit more involved.
    A good referance book on the topic is Donnally's "handloaders guide to cartridge conversions"
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  • Rochelle
    I am trying to make a 12.7X44MM for the Swedish rolling block. I have found several referencenes for different cartridges that can be reformed to this .50 caliber case. Once I find some kindergarden instructions on how to reform a case up this far I am going to go with the most ecominal cases and equipment I can find.
    New cases are aviable but at over $3.00 per case, I am willing to go with reformend cases.

    I am hopeing I can find the instructions on line rather than purchaseing a book.

    Thanks for the info.
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  • bpost
    Find one with a base diameter and length that is as close as possible. If it is a big change in dimensions, trim and or anneal the cases first. I like to use a two step approach, sizing down to the neck shoulder area, then resetting the die for final form.
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  • DaveF
    I shoot this same rifle, using cut down and fireformed .348 Winchester brass, mainly because I enjoy reforming brass, and had a bunch of 348 already on hand.
    Others use 50-70 brass, with the rim diameter, and sometimes the base diameter, reduced slightly. The length of the 50-70 case might also need trimming back, depending on your rifle's chamber, as there are sometimes small variations in chamber dimension.
    I load using RCBS 50-70 dies, with an RCBS #5 (348) shellholder, and they fit in my 12.7X44R chamber with no problems.
    Both the Lee 515-450-F and the Lyman 515141 bullets shoot well out of my rifle, which has a very decent bore, using either black, or light loads of smokeless, powders.
    More information is on-line at dutchman.rebooty.com/12744r.html, or do a search on the Castboolits website.
    They are fun rifles to play with.
    Regards, DaveF.
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