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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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. * * 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
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. * * 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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