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

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Tatume
.400 member

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

458 Win Mag & cast
#166637 - 23/08/10 02:06 AM

Hi Folks,

I'd like to load some 350 gr gas check bullets at about 1800 fps in the 458 Win Mag. Any suggestions on where to start? Accuracy is my primary criterion.

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Take care, Tom
NRA Life Member

Edited by Tatume (23/08/10 02:07 AM)

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AkMike
.416 member

Reged: 19/11/05
Posts: 2576
Loc: Anchorage, Alaska

Re: 458 Win Mag & cast [Re: Tatume]
#166666 - 23/08/10 01:05 PM

http://stevespages.com/page8a.htm

http://www.accuratereloading.com/reload.html

http://castboolits.gunloads.com/forumdisplay.php?f=45

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"When you see that in order to produce, you need to obtain permission from men who produce nothing; when you see that money is flowing to those who deal not in goods, but in favors; you may know that your society is doomed." Ayn Rand

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mauserand9mm
.400 member

Reged: 03/09/09
Posts: 1068
Loc: Queensland, Australia

Re: 458 Win Mag & cast [Re: AkMike]
#166667 - 23/08/10 01:36 PM

I'd guess that 2400 would be in right sort of range for the speed you are after but I have no experience with the projectile or the powder.

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bonanza
.400 member

Reged: 17/05/04
Posts: 2335
Loc: South Carolina

Re: 458 Win Mag & cast [Re: Tatume]
#166694 - 23/08/10 10:24 PM

I'd try 60gr 4198, see what you get then start reducing until you get 1800 FPS. Varget with a foam filler would also work, however; my real advise is to go with a heavy cast bullet because they are easier to slow down. I like the Cast Performance 460gr GC at about 1500.

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"Speak Precisely" G. Gordon Liddy.

"Life is absurd, chaotic and we must define its purpose with our actions" Abert Camus

"I''m the dude playing a dude disguised as another dude."

"Yo! Mr. White"

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DarylS
.700 member

Reged: 10/08/05
Posts: 27535
Loc: Beautiful British Columbia, Ca...

Re: 458 Win Mag & cast [Re: bonanza]
#166699 - 24/08/10 12:28 AM

I'd use about 55.0gr. to 60.00 H4895. You might find you don't need any fillers with this powder.

I personally prefer cast bullets in the 400gr. to 460gr. range - Lee, Lyman or RCBS. The Lee and RCBS are gas checked, Lyman plain based. Plain base bullets work fine with a gas check seated upsidedown under them or with a thick card wad, like cut from monopoly board.

That said, I used a 350gr. cast (Lyman RN hard, w/gas check) on a couple descent sized black bears back in the 70's from my first .458 2". The first was a slow, 1,450fps load through both 'lights'- bear waddled 30 yards and piled up dead. The second was making 1,850fps, took the bear between the eyes, looking me in the eyes while hanging onto a big Cotton-Wood tree, prior to him climbing. Bullet exited the back of the skull - hors-de-combat.

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

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

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nobade
.224 member

Reged: 01/12/08
Posts: 3
Loc: Albuquerque, NM

Re: 458 Win Mag & cast [Re: DarylS]
#167156 - 03/09/10 11:39 PM

47.0gr. IMR4227 will get you there at 20KSI.

Edited by nobade (03/09/10 11:40 PM)

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