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Double Rifles, Single Shots & Combinations >> Double Rifles
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BillfromOregon
.333 member


Reged: 27/10/04
Posts: 254
Loc: Sweetwater, by God Texas
.577 twist rates?
      #60358 - 26/07/06 05:51 AM

Gents: I am looking for information on the barrel twist rates for the various .577 black powder express cartridges. Can anyone help?
Many thanks.

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Marrakai
.416 member


Reged: 09/01/03
Posts: 3595
Loc: Darwin, Top End of Australia
Re: .577 twist rates? [Re: BillfromOregon]
      #60379 - 26/07/06 12:34 PM

Bill:
The twist rate in my 'modern' Greener Empire .577 Light Nitro double is somewhere between 14 and 15 inches. I have no idea who made the barrels, but they stabilise jacketed 650-grainers at 1675 fps very well indeed.

I'll measure my 20-bore/.577 Express this weekend if I don't go bush. It will be a lot slower...


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Marrakai
When the bull drops, the bullshit stops!
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www.marrakai-adventure.com.au

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Raff
.300 member


Reged: 12/01/04
Posts: 182
Loc: Texas
Re: .577 twist rates? [Re: BillfromOregon]
      #60381 - 26/07/06 01:02 PM

Bill
Alex. Henry 3"BPE, 1:28. Very early DR.
Adams & Co. 3" BPE 1:20 About 1880 or a bit later.

Hope this helps.
Raff

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BillfromOregon
.333 member


Reged: 27/10/04
Posts: 254
Loc: Sweetwater, by God Texas
Re: .577 twist rates? [Re: Raff]
      #60389 - 26/07/06 04:35 PM

Fellas, I really appreciate your help. I am surprised at how fast the twists are. My reason for asking is that I am thinking of building a single-shot in one of the .577 BP calibers. If I use a Martini, I will of course be limited on case length. What got me interested in twist rates is that Pac-Nor offers a .577 barrel with a 1:18 twist, which I fear is too quick for soft lead and black powder. But perhaps not.

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