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

DarylS
.700 member

Reged: 10/08/05
Posts: 27731
Loc: Beautiful British Columbia, Ca...

Re: Barrel steel ???
31/10/09 01:25 PM

Ed- although Green Mountain uses 4140 for their ctg. brrels teels for BP rifles, they use something 'softer' or a different alloy for the muzzleloading barrels.

Round ball guns such as ours, with outside ignition fall into the 15,000psi range for max pressure & I 'assume' most RB barrels are made with this in mind. For CTG guns, the barerl companies usually use 4140, which is the standard for all modern rifles as well, but I don't know about the heat treatment, whether these BP ctg. barrels are acceptable to high pressure rounds. I shoot relatively low pressure smokeless in my .45/60 GM barrel regularly, expecting them to be in the 24,000PSI range or under. That big fat angled Sharps firing pin keeps my loads reasonable.

Shooting slugs greatly increases the pressure - witness the .45/70 - a mere 70gr. 2F, with a 405gr. bullet and closed ignition runs 22,000psi, a typical .50/90, about 24,000 and a .45 3-1/4 - around 30,000.

There was a question about wear. Naked, grooved lubricated bullets will wear the barrel less than any other form of patching. Steel would being the worse, then gilding metal, copper, paper,cloth, then naked being the least.

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

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

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Subject	Posted by	Posted on
Barrel steel ???	Longknife	23/05/09 02:26 AM
Re: Barrel steel ???	Dphariss	29/06/09 08:57 AM
Re: Barrel steel ???	MarinePMI	23/05/09 05:50 AM
Re: Barrel steel ???	Dphariss	29/06/09 09:12 AM
Re: Barrel steel ???	kamilaroi	29/06/09 12:09 PM
Re: Barrel steel ???	333Jeffery	31/07/09 10:22 AM
Re: Barrel steel ???	Bramble	01/08/09 03:00 AM
Re: Barrel steel ???	Altamaha	31/10/09 05:03 AM
Re: Barrel steel ???	DarylS	31/10/09 01:25 PM
Re: Barrel steel ???	9.3x57	31/10/09 01:43 PM
Re: Barrel steel ???	DarylS	01/11/09 02:46 AM
Re: Barrel steel ???	Tatume	23/05/09 07:16 AM
Re: Barrel steel ???	Bramble	23/05/09 07:32 AM
Re: Barrel steel ???	Longknife	24/05/09 06:21 AM
Re: Barrel steel ???	Tatume	23/05/09 05:04 AM

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