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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles

albertan
.333 member

Reged: 13/06/06
Posts: 432
Loc: Alberta, Canada

Re: Zastava .458 Win Mag
05/09/12 04:00 PM

I suspect poor annealing of that case. I don't know if Winchester double anneals a straight walled case like a .458. On cases with shoulders they do.

If you are going to reload a .458 Winchester, I would recommend that you anneal every time you size the brass. Lack of neck tension will cause you a lot of grief. I strongly suspect that brittle case necks (and subsequent poor neck tension)in this calibre were the cause of many of this cartridges (overblown) problems.

I load this calibre. When .458 brass was scarce in Canada I found a couple of tricks that helped extend the life of the brass and cartridge performance.

I do not expand the case at the mouth to allow for easier seating. I use a .50 calibre VLD inside neck chamfering tool to allow for problem free bullet seating. Seven twists of the wrist works. A dozen different bullet styles ( at least) played with , and no problems, AKA crushed cases.

I anneal every time. This ensures proper neck tension. The Hornady kit works. There are other ways of doing this.

I use a Lee factory crimp die. I seat and crimp in 2 passes. But I have never had a problem. Many times, my loads are varmit rifle accurate. I also use 2 seaters. One for the solid, and one for the soft.

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Subject	Posted by	Posted on
Zastava .458 Win Mag	Ash	08/09/11 09:36 PM
Re: Zastava .458 Win Mag	tophet1	08/09/11 09:39 PM
Re: Zastava .458 Win Mag	Ben	08/09/11 10:03 PM
Re: Zastava .458 Win Mag	Ash	08/09/11 11:10 PM
Re: Zastava .458 Win Mag	Rule303	11/09/11 01:10 PM
Re: Zastava .458 Win Mag	grantc	25/08/12 05:05 PM
Re: Zastava .458 Win Mag	Ash	01/09/12 08:45 PM
Re: Zastava .458 Win Mag	eagle27	02/09/12 07:50 AM
Re: Zastava .458 Win Mag	aromakr	04/09/12 05:55 AM
Re: Zastava .458 Win Mag	DarylS	04/09/12 07:24 AM
Re: Zastava .458 Win Mag	albertan	05/09/12 04:00 PM
Re: Zastava .458 Win Mag	DarylS	06/09/12 12:21 AM
Re: Zastava .458 Win Mag	Oldbrit	09/09/11 04:00 AM
Re: Zastava .458 Win Mag	Ben	09/09/11 07:20 AM
Re: Zastava .458 Win Mag	mauserand9mm	09/09/11 09:06 AM

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