The Accurate Reloading Forums
what about polygonal rifling?
29 August 2007, 09:36
Indlovuwhat about polygonal rifling?
can anyone shed light on why polygonal rifling is basically ignored by custom barrel makers, and all US commercial makers?
The advantages seem to be many; less bullet deformation, less fouling, slightly higher velocity etc. As for accuracy, I have 2 HK semi auto rifles, an HK 770 (308) and 630 (223).
Both give sub MOA groups with handloads.I know Lothar Walther offers custom polgonal rifled barrels in 308. Does anyone have any exprience with these?
29 August 2007, 11:08
EdmondI have used a few polygonal rifling Lothar Walther barrels and got sub MoA with all of them. Same for a colleague who really uses a lot of them year after year.
29 August 2007, 11:19
MacifejPolygonal is très bon!
How are things under the Sarkozy regime mon frere?
29 August 2007, 15:13
eddieharrenI have been installing the 11 twist 5P 308 barrels from Gary Schneider for the last couple of years. The LE agencies that I build for are very pleased with the accuracy and easy cleanup.
David Tubb has been shooting Gary's 6MM 8 twist 5P for years. I believe PacNor also makes Polygonal barrels.
29 August 2007, 15:32
Edmondquote:
Originally posted by Macifej:
Polygonal is très bon!
How are things under the Sarkozy regime mon frere?
Wait and see..
30 August 2007, 03:52
zimbabweMy H&K P7 certainly stays clean and can't fault the accuracy. Only one I've ever had.
SCI Life Member
NRA Patron Life Member
DRSS
30 August 2007, 03:58
KSTEPHENSmy cold hammer forged poly rifled steyrs with progressive twist seem to shoot accurate enough.
when you have a factory rifle that shoots as well as a steyr you start wondering how many people buy based on quality and how many buy based on what thier buddy shoots or they read in print.
30 August 2007, 04:06
jørgen[QUOTE]Originally posted by KSTEPHENS:
my cold hammer forged poly rifled steyrs with progressive twist seem to shoot accurate enough.
when you have a factory rifle that shoots as well as a steyr you start wondering how many people buy based on quality and how many buy based on what thier buddy shoots or they read in print.[/QUOT
It would suprise me extremly if steyr makes polygonal hammerforged barrels with progresive twist.
The most amazing task, would be pulling the carbide mandrell out of the progresive twist
30 August 2007, 07:33
butchlambertmight strip the threads er rifling.
Butch
30 August 2007, 12:09
N E 450 No2I have a 308 McMillman Match rifle with polygonal rifling. It is very accurate to 1000 yards, and very easy to clean.
I am suprised it is not more popular.
DOUBLE RIFLE SHOOTERS SOCIETY
30 August 2007, 12:16
Edmondquote:
Originally posted by jørgen:
[QUOTE]Originally posted by KSTEPHENS:
my cold hammer forged poly rifled steyrs with progressive twist seem to shoot accurate enough.
when you have a factory rifle that shoots as well as a steyr you start wondering how many people buy based on quality and how many buy based on what thier buddy shoots or they read in print.[/QUOT
It would suprise me extremly if steyr makes polygonal hammerforged barrels with progresive twist.
The most amazing task, would be pulling the carbide mandrell out of the progresive twist
30 August 2007, 13:11
b.martinsquote:
Originally posted by jørgen:
[QUOTE]Originally posted by KSTEPHENS:
my cold hammer forged poly rifled steyrs with progressive twist seem to shoot accurate enough.
when you have a factory rifle that shoots as well as a steyr you start wondering how many people buy based on quality and how many buy based on what thier buddy shoots or they read in print.[/QUOT
It would suprise me extremly if steyr makes polygonal hammerforged barrels with progresive twist.
The most amazing task, would be pulling the carbide mandrell out of the progresive twist
jørgen,
Steyrs are polygonal cold hammer forged with a progressive twist.
On the
outside B.Martins
What every gun needs, apart from calibre, is a good shot and hunter behind it. - José Pardal
30 August 2007, 13:19
Edmond
30 August 2007, 15:12
meteIIRC it was Steyr who invented the hammer forging machinery for making a barrel in the 1960s. Starting out with a drilled slug about 12" long and hammer forging it to size and length. They made lots of money selling the machinery to the other makers including Remington.
31 August 2007, 00:53
jørgenquote:
Originally posted by b.martins:
quote:
Originally posted by jørgen:
[QUOTE]Originally posted by KSTEPHENS:
my cold hammer forged poly rifled steyrs with progressive twist seem to shoot accurate enough.
when you have a factory rifle that shoots as well as a steyr you start wondering how many people buy based on quality and how many buy based on what thier buddy shoots or they read in print.[/QUOT
It would suprise me extremly if steyr makes polygonal hammerforged barrels with progresive twist.
The most amazing task, would be pulling the carbide mandrell out of the progresive twist
jørgen,
Steyrs are polygonal cold hammer forged with a
progressive twist.
On the
outside B.Martins
I ame not sure but i think it is the opposit (depressive?
) at least the twist is fastest at the chamber end
31 August 2007, 00:58
jørgenquote:
Originally posted by mete:
IIRC it was Steyr who invented the hammer forging machinery for making a barrel in the 1960s. Starting out with a drilled slug about 12" long and hammer forging it to size and length. They made lots of money selling the machinery to the other makers including Remington.
Perhaps Steyr produced and developed hammerforging mashinery.
But the hammerforgingprocess was invented by an employed of a wellknown german painter with a caracteristic mustace
31 August 2007, 11:23
IndlovuI have a steyr in 308 which does shoot amazingly well for a una;tered factory rifle, and is very easy to clean. It does have a "twist" on the OUTSIDE of the barrel, but i suspect this is largely cosmetic (a la barrel flutes etc). I know of only a single production arm with a progressive or gain twist barrel, and that is S&W's 460 mag handgun. Does anyone know of ANY gain twist sporting rifles? It seems like a good idea, must be hard to manufacture?