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Duke
04-03-2008, 07:27 PM
I was reading about the incredible accuracy of both Whitworth and Kerr rifles used by Confederate sharpshooters during the American Civil War.

Does anybody know how the hexagonal rifling was cut into the barrels of these rifles?

I can understand the engineering of cutting normal rifling into smooth bore tubes but how do you force a hexagonal spiral cut down the length of a gun barrel?

Over to you experts!
tacfoley
09-05-2008, 10:18 AM
Dear Mr Duke - First you start off with a long drill that makes the starter hole, then you cut the rifling 'flats' one by one until you have completed the six-sided bore. You don't 'force a hexagonal spiral cut down the length' of the gun barrel - the cutting tool [it looks a bit like a witch's 'snaggle tooth'] is pulled through the bore in a spiral motion from the breech end to the muzzle.

Is this what you wanted to know?

tac
robinghewitt
10-05-2008, 11:50 PM
Here's an Enfield sine bar rifling machine, think he lost perspective on the rails a bit :D

Love the bunch of leaves under the bore, presumably to catch oily cuttings?

Piccy Link (http://www.robinhewitt.net/rifling.jpg)
tacfoley
11-05-2008, 05:29 PM
Ah, Mr Robin - now I know that YOU are a poster here, I need not bother to answer any more queries regarding the technicalities and history of black powder arms. :)

That will save me a lot of future embarrassment, I'm sure.

Best wishes

tac
robinghewitt
12-05-2008, 10:18 PM
Ah, Mr Robin - now I know that YOU are a poster here, I need not bother to answer any more queries regarding the technicalities and history of black powder arms. :)

Fame in my own time :D

But, what are you doing on an airgun forum? :confused:
tacfoley
13-05-2008, 08:02 PM
Fame in my own time :D

But, what are you doing on an airgun forum? :confused:

Well, I was looking for somebody to repair my old Walther LP3, and also trying to find Mark Bradley the black rifle builder, and here I am!

Both questions have been answered here, thanks to the great responses from folks who know more than I do.

Now you are here, knowing far more than I do about BP, I can go away again.

Best wishes

tac