Take a look at this rifle and let me know what you think about invisible rifling. Jerry

http://www.gunsamerica.com/guns/976229982.htm

They probably mean Lancaster oval-bore rifling, which at 1st glance seems like a smoothbore indeed. However, when you shoot, you should be able to notice a 'twist'in the powder fouling...

'Invisible rifling'? we call that a musket or a shotgun.

George

Rigby Invisable rifleing is, at first glance, worn out regular rifleing. The lands and grooves are rounded, so look worn when brand new. This was the chosen rifleing for target rifles of the 19th century, and is basicly designed to be used with Paper patch bullets, or hollow based lead bullets from brass bore shells. I have a Westley Richards 500/450#1 express double rifle with this rifleing. It has sel ejectors, engraved with English scroll, leather covered butt. I bought this rifle with it's O&L case, dies, two boxes of loaded ammo, and 40 rounds of brass , for $2100 US, because the store where I bought thought it was worn out!

I don't curently have a scanner, or I'd post a picture of this type rifleing.

In regard to the 8 bore you are looking at, I believe the price is high for a black powder bore rifle! Just my opinion!

Is it any old kind of polygonal barrel or so ?
Never heard about that.

Jiri

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Originally posted by Minkman:
Take a look at this rifle and let me know what you think about invisible rifling. Jerry

http://www.gunsamerica.com/guns/976229982.htm

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In the Lancaster "oval bore", the bore is not a circle, but a very slight oval shape. The oval shape rotates along the length of the barrel, imparting a spin to the bullet.

quote:

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Originally posted by Jiri:
Is it any old kind of polygonal barrel or so ?
Never heard about that.Jiri

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Yes, there are a number of them, actually. But while you can SEE the poly-type rifling, the Lancaster oval bore appears to be a smooth-bore, like a shotgun!

MacD37

So your saying there button barrel's

Like the kinda Chick Donnelly make's and sell's here in Oregon..?

I've always wanted a "invisable" rifling double for some odd reason. This one is a Jeffery 8 bore and pretty desirable although It looks like the stock has been refinished. I'd agree 15K is a bit high, but it is a Jeffery!-Rob

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Originally posted by MartinPotts:
MacD37

So your saying there button barrel's

Like the kinda Chick Donnelly make's and sell's here in Oregon..?

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I don't quite know what you mean by a "BUTTON BARREL"! If you mean the method use to rifle the barrel, then there are many ways to obtain the same type of rifleing.

The short explanation I'm about to give is not meant to say you do not already know this, but to explain to those who do not, and may be reading this!

It can be done by hand on a boreing machine cutting one groove at a time with a blade cutting the groove, then indexing to the next one then cutting that one, tedious, and only as good as the man doing the cutting. also by pulling a button through the bore, while turning it at the proper rate of twist to displace steel, by swagging, to form the rifleing. Others are done by what is called "HAMMER FORGEING" which is done by cutting the reverse rifleing on a very hard mandril which is pushed into the bore size hole through the barrel blank, the rotory hammers are spun around the blank forgeing the steel into the spaces between the reverse groove ridges on the mandril, to form lands, the the mandril is removed. IMO this is the best method of rifleing, but is expencive, because of the tooling involved.

The Rigby rifleing I was refereing to, in my other post, is exactly like ballard rifleing, but the difference is, the lands, and grooves are round, rather than square edged! This rifleing pattern was quite popular in target rifle of the day.

MacD37

I dropped you a PM

quote:

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Originally posted by MartinPotts:
MacD37

I dropped you a PM

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Thanks Martin, got your very clear, and presice message, and I filed it away in my data bank for future explanations to others. Thank you! I think many on this web-site would enjoy reading your post, and I suggest you post it on the forum. Education is great, especially when it's free!