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Shooting & Reloading - Mausers, Big Bores and others >> Cast Bullets

Hunter4752001
.300 member

Reged: 25/01/10
Posts: 124
Loc: Australia

Re: How important is a metplat on cast bullets for hunting
06/09/20 08:29 AM

450. Sizing was one of the reasons I suggested contacting John. He often has bullet moulds for producing non-standard diameters, but doesn't list them on the website. At the least it would be worth a call or email to see if he can do .459 or .460. If he doesn't have them, nothing lost.

As to hardness, that's where we come up against competing properties of the lead alloy. The alloy must be hard enough to take the rifling and to hold its shape when penetrating the target. At the same time it must be malleable enough to obturate in the bore. It must also hold together and not shatter on impact. Typically lead alloys for use in bullets are a mix of lead and tin. The tin gives the hardness. Too much tin creates a brittle bullet which will shatter on impact. An alloy that also contains 4-6% antimony can allow for a harder yet malleable bullet IF you also do a heat treating process. Trace amounts of arsenic can also help. But all of this involves getting into custom alloys, casting yourself and a lot more work.

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Entire topic
Subject	Posted by	Posted on
How important is a metplat on cast bullets for hunting	450	05/09/20 01:11 PM
Re: How important is a metplat on cast bullets for hunting	eagle27	05/09/20 01:56 PM
Re: How important is a metplat on cast bullets for hunting	450	05/09/20 02:53 PM
Re: How important is a metplat on cast bullets for hunting	Hunter4752001	05/09/20 06:19 PM
Re: How important is a metplat on cast bullets for hunting	450	05/09/20 07:33 PM
Re: How important is a metplat on cast bullets for hunting	DarylS	06/09/20 02:07 AM
Re: How important is a metplat on cast bullets for hunting	eagle27	06/09/20 06:57 AM
Re: How important is a metplat on cast bullets for hunting	Rule303	06/09/20 08:01 AM
Re: How important is a metplat on cast bullets for hunting	Hunter4752001	06/09/20 08:29 AM
Re: How important is a metplat on cast bullets for hunting	450	06/09/20 05:25 PM
Re: How important is a metplat on cast bullets for hunting	DarylS	07/09/20 05:45 AM
Re: How important is a metplat on cast bullets for hunting	Rhodes	07/09/20 03:07 PM
Re: How important is a metplat on cast bullets for hunting	450	07/09/20 04:58 PM
Re: How important is a metplat on cast bullets for hunting	Rhodes	08/09/20 06:16 AM
Re: How important is a metplat on cast bullets for hunting	450	08/09/20 12:32 PM
Re: How important is a metplat on cast bullets for hunting	DarylS	09/09/20 02:28 AM

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