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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles
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DarylS
.700 member


Reged: 10/08/05
Posts: 27700
Loc: Beautiful British Columbia, Ca...
Re: .458 Winchester Magnum
      12/06/25 09:26 AM

I do think your situation was with brittle brass, however,

not entirely sure what causes splits. When we are forming .17AH from (even new) .22 Hornet brass, the normal 'deal' is to neck .22 Hornet down in the .17 AH seating die to .204" then use the FL die to neck to hold the .172" bullet.
Now, if the fireforming load is too light as when using 3 gr. bullseye with kapok, the shoulder will only partially form and will have splits around it's perifery.
A full power load, as used in formed brass, forms the brass perfectly, with no splits - ever.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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Entire topic
Subject Posted by Posted on
* .458 Winchester Magnum NitroXAdministrator 10/06/25 01:57 AM
. * * Re: .458 Winchester Magnum 85lc   10/06/25 02:43 AM
. * * Re: .458 Winchester Magnum bwanabobftw   10/06/25 06:48 AM
. * * Re: .458 Winchester Magnum Claydog   10/06/25 08:04 AM
. * * Re: .458 Winchester Magnum DarylS   10/06/25 09:23 AM
. * * Re: .458 Winchester Magnum Rule303   10/06/25 11:21 AM
. * * Re: .458 Winchester Magnum 85lc   11/06/25 05:41 AM
. * * Re: .458 Winchester Magnum DarylS   11/06/25 10:58 PM
. * * Re: .458 Winchester Magnum 85lc   12/06/25 01:33 AM
. * * Re: .458 Winchester Magnum DarylS   12/06/25 04:58 AM
. * * Re: .458 Winchester Magnum 85lc   12/06/25 07:30 AM
. * * Re: .458 Winchester Magnum DarylS   12/06/25 09:26 AM

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