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Double Rifles, Single Shots & Combinations >> Single Shots & Combination Guns
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CapeGunner
.224 member


Reged: 09/11/06
Posts: 19
Loc: New York-Hudson Valley-USA
What's straight rifleing for anyway?
      #87292 - 17/10/07 02:06 PM

I just came across a German gun from about 1880-1900. Hammer double barrel. The right barrel is about 45 cal. I thought the left barrel was 16ga. I was right but is has straight rifleing the entire length. I couldn't count them but quite a few lands/grooves. Anyone know what this if for? Is it for shot or for some sort of single projectile? I'd like to buy it but I also want to shoot it. The right barrel has several rounds with it so it will be a case of making up some but the left barrel has me stumped.

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empirevr
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Reged: 03/09/06
Posts: 614
Loc: England,but now Italy.
Re: What's straight rifleing for anyway? [Re: CapeGunner]
      #87339 - 18/10/07 04:56 AM

Hmm

Invisible rifling/oval bore maybe???

Ben

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Plains99
.300 member


Reged: 10/11/04
Posts: 225
Loc: Dodge City, Kansas, USA
Re: What's straight rifleing for anyway? [Re: empirevr]
      #87383 - 18/10/07 11:54 PM

White inline muzzleloading shotguns also had straight rifling. Designed told me it was to stabilize and improve shot patterns. I killed a turkey in Florida with one at 52 measured yards so there must be something to it.

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fuhrmann
.333 member


Reged: 04/01/05
Posts: 329
Loc: Switzerland
Re: What's straight rifleing for anyway? [Re: Plains99]
      #89172 - 17/11/07 06:33 PM

This in an excerpt from the Norwegian gun magazine "Våpenjournalen" number 3 1998, written by the late Svein Sollie. I got the article and the English translation from a Norwegian shooter and Husqvarna expert:
______________
-*-

A Cape Gun for the Commons:

HUSQVARNA MODEL 17

....
Just as the Model 20, the cape gun Model 17 was produced over a very long period of time. There were 3 different versions of it, the calibres being the difference between them. All
could be delivered with shotgun barrel in caliber 16 or 20, and you could choose between an ordinary smooth shotgun barrel with full choke or a straight rifled shotgun barrel with no choke. The argument for straight rifling seems rather vague; the original idea was that the straight rifles would keep the fouling in the rifling to make loading easier, but this makes little sense in a breech loader?

Some people thought that the straight rifles gave the shotgun magic properties, especially when loaded with a ball. Anyway, such barrels make a pretty normal pattern comparable with a cylinder bore when loaded with shot, and since the dimensions suit the ball diameter a
bit better than the smoothbore in same calibre, they normally shoot better than a smoothbore when loaded with a ball.
........

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DarylS
.700 member


Reged: 10/08/05
Posts: 27736
Loc: Beautiful British Columbia, Ca...
Re: What's straight rifleing for anyway? [Re: fuhrmann]
      #89198 - 18/11/07 03:01 AM

Straight rifling in a shotgun bore will prevent shot-cup rotation and is being experimented with by some firms today.
; Shot cups have proven, thorugh photography, to take on a spin going through the bore of a normal shotgun. Preventing the spin tends to tighten the pattern somewhat and of course, extend the range. The trouble with rifling and plastic shot cups, is the corners of the grooves will tend to pick up plastic fouling.

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


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

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Marrakai
.416 member


Reged: 09/01/03
Posts: 3729
Loc: Darwin, Top End of Australia
Re: What's straight rifleing for anyway? [Re: DarylS]
      #89220 - 18/11/07 10:54 AM

Darryl:
That's an interesting 'twist' on an old concept, discovering a modern use for a vintage feature. Of course there were no plastic wads or shotcups in existence during the heyday of straight-rifled bore-guns.

I'd be interested to hear more about plastic shot-cups taking on a spin when fired down a smooth bore. How much spin? If this could be harnessed or controlled, it might be a way to open patterns deliberately. Of course, we should always be mindful of the 'urban myth' of spin-stabilisation in 'rifled' shotgun slugs!

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

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