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

Tatume
.400 member

Reged: 09/06/07
Posts: 1091
Loc: Gloucester, Va USA

Re: cast loads in 458WM
14/03/10 10:57 PM

I've seen bullet seating depth make a small difference in accuracy, but never have I seen a change in depth cause key holing. May I suggest that you measure the diameter of the cast bullets? Ideally, they should be 0.459" or 0.460" for a 458 Win Mag. Any less than 0.458" will explain your key holes.

Another phenomenon I've witnessed is soft bullets causing a buildup of lead in the bore that squeezes bullets to an undersized condition. These will key hole. This can get so bad with some promotional 22 LR ammo (550 rounds per box), that the impacts on the 25-yard target will be difficult to recognize as bullet holes.

Using cast bullets in the 458 Win Mag is a great way to shoot economically, and to practice without developing bad habits. I'm surprised you're having so much trouble. I use the RCBS 45-405-FN mould to cast bullets from wheel weights. I size them 0.459" with LBT Blue Soft lube and Hornady gas checks. They work wonderfully.

--------------------
Take care, Tom
NRA Life Member

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Subject	Posted by	Posted on
cast loads in 458WM	mauserand9mm	07/03/10 09:00 PM
Re: cast loads in 458WM	bonanza	30/04/10 12:49 AM
Re: cast loads in 458WM	mauserand9mm	30/04/10 08:41 PM
Re: cast loads in 458WM	mauserand9mm	17/05/10 01:29 PM
Re: cast loads in 458WM	mauserand9mm	05/11/10 07:59 AM
Re: cast loads in 458WM	DarylS	05/11/10 11:49 AM
Re: cast loads in 458WM	mauserand9mm	05/11/10 09:57 AM
Re: cast loads in 458WM	DarylS	06/11/10 03:32 AM
Re: cast loads in 458WM	VonGruff	06/11/10 05:58 AM
Re: cast loads in 458WM	mauserand9mm	07/11/10 08:39 PM
Re: cast loads in 458WM	Tatume	07/03/10 11:01 PM
Re: cast loads in 458WM	bonanza	08/11/10 03:17 AM
Re: cast loads in 458WM	mauserand9mm	08/03/10 10:30 AM
Re: cast loads in 458WM	Tatume	08/03/10 11:35 PM
Re: cast loads in 458WM	mauserand9mm	09/03/10 11:31 AM
Re: cast loads in 458WM	450_Ackley	09/03/10 04:28 PM
Re: cast loads in 458WM	Tatume	09/03/10 11:12 PM
Re: cast loads in 458WM	DarylS	10/03/10 03:26 AM
Re: cast loads in 458WM	450_Ackley	10/03/10 07:38 AM
Re: cast loads in 458WM	mauserand9mm	10/03/10 11:52 AM
Re: cast loads in 458WM	Tatume	11/03/10 12:24 AM
Re: cast loads in 458WM	DarylS	11/03/10 12:40 PM
Re: cast loads in 458WM	450	11/03/10 04:39 PM
Re: cast loads in 458WM	mauserand9mm	11/03/10 10:19 PM
Re: cast loads in 458WM	DarylS	12/03/10 01:49 AM
Re: cast loads in 458WM	mauserand9mm	12/03/10 11:29 AM
Re: cast loads in 458WM	DarylS	13/03/10 04:00 AM
Re: cast loads in 458WM	Tatume	13/03/10 06:45 AM
Re: cast loads in 458WM	gwindrider1	16/03/10 12:28 PM
Re: cast loads in 458WM	mauserand9mm	18/03/10 11:44 AM
Re: cast loads in 458WM	450_Ackley	18/03/10 07:04 PM
Re: cast loads in 458WM	450	23/03/10 08:24 PM
Re: cast loads in 458WM	DarylS	24/03/10 07:12 AM
Re: cast loads in 458WM	mauserand9mm	24/03/10 01:50 PM
Re: cast loads in 458WM	DarylS	24/03/10 11:19 PM
Re: cast loads in 458WM	mauserand9mm	25/03/10 09:58 AM
Re: cast loads in 458WM	eagle27	25/03/10 05:29 PM
Re: cast loads in 458WM	DarylS	26/03/10 01:00 AM
Re: cast loads in 458WM	greenshoots	26/03/10 06:08 AM
Re: cast loads in 458WM	86thecat	29/03/10 12:55 PM
Re: cast loads in 458WM	mauserand9mm	29/04/10 08:51 PM
Re: cast loads in 458WM	DarylS	29/04/10 10:00 PM
Re: cast loads in 458WM	mauserand9mm	14/03/10 08:43 PM
Re: cast loads in 458WM	eagle27	14/03/10 09:09 PM
Re: cast loads in 458WM	Tatume	14/03/10 10:57 PM
Re: cast loads in 458WM	DarylS	15/03/10 02:52 AM
Re: cast loads in 458WM	mauserand9mm	15/03/10 09:54 AM
Re: cast loads in 458WM	DarylS	15/03/10 10:22 AM
Re: cast loads in 458WM	9dot3x74R	15/03/10 12:19 PM
Re: cast loads in 458WM	DarylS	15/03/10 12:59 PM
Re: cast loads in 458WM	mauserand9mm	15/03/10 02:10 PM
Re: cast loads in 458WM	450_Ackley	15/03/10 06:14 PM
Re: cast loads in 458WM	450	12/03/10 04:56 PM
Re: cast loads in 458WM	DarylS	10/03/10 12:25 PM
Re: cast loads in 458WM	86thecat	10/03/10 05:18 PM
Re: cast loads in 458WM	450_Ackley	08/03/10 02:22 PM
Re: cast loads in 458WM	DarylS	08/03/10 03:25 PM
Re: cast loads in 458WM	mauserand9mm	08/03/10 06:07 PM
Re: cast loads in 458WM	450_Ackley	08/03/10 08:44 PM

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