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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

DarylS
.700 member

Reged: 10/08/05
Posts: 27732
Loc: Beautiful British Columbia, Ca...

Re: Building a DR in .460 S & W ???
30/10/09 01:44 AM

The .444 Marlin or .38/55 would be a great choice,as would the .375, a necked down .444.

If building a .444, I suggest you get a faster twist in the 20" to 24" range. The typical rifle twist for the .44 is 38", which will not normally stabilize .430" bullets over 300gr.

If going .38/55, a .375 Winchester chambering might be better as it has stronger brass and components are quite readily aquired. .38/55 brass is typically .050" longer than .375 or .30/30 brass. I use blown out .30/30 brass in my Winchester .375.

I'm with Peter on ctg. choice - as to a .45/70, although a .444 with 20" twist for 350gr. to 400gr. bullets has a great deal of attraction for me. It should do about 1,700fps with a 400gr. at under 40,000PSI, maybe 1,850fps with a 350.

You would be hard pressed to get a 200gr. bullet at 2,400fps from the .38/55 (or .375Win.) case at safe pressures for the double, I think - about 2,300fps is about tops andthat would be over 50,000PSI. Lee's handloading book has data for AA1680 pushing 220gr. to 2,400fps from 24" bls.(not specified). I tired them in my .375Winch., which normally operates around 55,000PSI & felt they were way too hot. With this small capacity case, it takes a lot of increased pressure to get just a few more fps. More capacity would be better in that calibre.

A .375JDJ (necked .444) chambering on 24" tubes might deliver 2,250fps with a 270gr., and the new .375", 225gr. Spire point by Hornady, a very heavily jacketed bullet should get around 2,550fps at reasonable pressures for the double - say, 45,000PSI. These ballistics are capable in a 9.3x57 in a m46 Husky, which operates in that pressure range with just a tich less capacity than the .375JDJ.
This bullet worked splendidly in 9.3x57's bullet testing on jugs and boards as well as Steer heads. It produced equally good results on 2 deer for him, with almost full length penetration and excellent expansion. A good choice for a fun gun, in my opinon.

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

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

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Subject	Posted by	Posted on
Building a DR in .460 S & W ???	Metalguy	27/10/09 01:11 PM
Re: Building a DR in .460 S & W ???	mehulkamdar	16/11/09 12:03 PM
Re: Building a DR in .460 S & W ???	Metalguy	16/11/09 01:53 PM
Re: Building a DR in .460 S & W ???	Mike_Bailey	16/11/09 11:31 PM
Re: Building a DR in .460 S & W ???	REN3	29/10/09 01:16 PM
Re: Building a DR in .460 S & W ???	Metalguy	29/10/09 03:11 PM
Re: Building a DR in .460 S & W ???	Snowwolfe	27/01/10 09:47 AM
Re: Building a DR in .460 S & W ???	Der_Jaeger	29/10/09 11:04 PM
Re: Building a DR in .460 S & W ???	Metalguy	30/10/09 12:22 AM
Re: Building a DR in .460 S & W ???	peter	30/10/09 01:12 AM
Re: Building a DR in .460 S & W ???	DarylS	30/10/09 01:44 AM
Re: Building a DR in .460 S & W ???	Metalguy	30/10/09 01:59 AM
Re: Building a DR in .460 S & W ???	bwananelson	30/10/09 02:08 AM
Re: Building a DR in .460 S & W ???	Metalguy	30/10/09 02:24 AM
Re: Building a DR in .460 S & W ???	Metalguy	31/10/09 02:23 AM
Re: Building a DR in .460 S & W ???	Yukon577	15/11/09 02:12 PM
Re: Building a DR in .460 S & W ???	Metalguy	15/11/09 02:35 PM
Re: Building a DR in .460 S & W ???	Birdhunter50	16/11/09 05:17 AM
Re: Building a DR in .460 S & W ???	BlainSmipy	01/12/09 02:45 PM
Re: Building a DR in .460 S & W ???	Metalguy	01/12/09 02:52 PM
Re: Building a DR in .460 S & W ???	wesinok	22/12/09 11:14 AM
Re: Building a DR in .460 S & W ???	Tatume	22/12/09 11:41 AM
Re: Building a DR in .460 S & W ???	Tallchief	24/12/09 02:42 AM
Re: Building a DR in .460 S & W ???	tinker	24/12/09 03:07 AM
Re: Building a DR in .460 S & W ???	DUGABOY1	29/12/09 09:47 AM
Re: Building a DR in .460 S & W ???	Tallchief	24/12/09 03:25 AM
Re: Building a DR in .460 S & W ???	DUGABOY1	29/12/09 10:08 AM
Re: Building a DR in .460 S & W ???	Metalguy	16/11/09 08:34 AM
Re: Building a DR in .460 S & W ???	bonanza	16/11/09 09:15 AM
Re: Building a DR in .460 S & W ???	Metalguy	16/11/09 09:25 AM
Re: Building a DR in .460 S & W ???	Metalguy	30/10/09 01:28 AM

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