Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

RIFLING TYPE

 
LinkBack Thread Tools Display Modes
  #1  
Old 07-14-2002, 04:43 PM
Gold Member
 
Join Date: Sep 2001
Location: North, Texas
Posts: 610
RIFLING TYPE

Ok I read about different types Cut,Button,Freebore and Polygonal any idea as to which is the best or is just personal choice? [img]images/icons/confused.gif[/img] Will one give faster spin or velocity? What about stabilizing the bullet longer?

If you have a question ask before its too late to ask . Or you might fail the test.
__________________
Courage,Spirit and Honor
Pass It On
Reply With Quote
  #2  
Old 07-14-2002, 07:21 PM
Junior Member
 
Join Date: Jun 2002
Location: Birmingham, Alabama
Posts: 20
Re: RIFLING TYPE

Cut rifling and Button rifling refer to how the rifling was created in the barrel. Cut rifling is made by individually cutting the grooves, one at a time a little at a time. Cut rifling is supposed to impart little to no stress on the barrel.

Button rifling is formed by pulling a slightly oversize carbide 'button' through the bore, which presses the grooves into the steel. Button rifling is supposed to be a little 'stressful' on barrels, but I'm not sure how much.

Freebore is really just an extra long throat, and not a rifling type. Weatherby uses it to keep the pressure from peaking so steeply on their magnum rounds.

Polygonal rifling is primarily used in handgun barrels. It can only be used with jacketed bullets, as cast bullets lead the barrel very fast. It is however, supposed to give a slight velocity increase with jacketed bullets. I don't know of anyone who uses Polygonal rifling in rifle barrels, but that doesn't mean that no one does.

As far as one type rifling stabilizing a bullet better than another, I don't think it would. That would depend more on the rate of twist that your barrel has. A faster twist equals a more stable bullet(more or less).

Hopefully this answered some of your questions. If not, maybe one of the serious shooters will chime in, and set us both straight.
__________________
See you, space cowboy...
Reply With Quote
  #3  
Old 07-14-2002, 09:11 PM
Gold Member
 
Join Date: Sep 2001
Location: North, Texas
Posts: 610
Re: RIFLING TYPE

Thanks for the info. As far as I know only I believe H&K does the polygonal rifling.
Reading another post I saw that the freebore system on Weatherbys is not the best but not the worst either. So that leaves the CUT or BUTTON RIFLING to choose from. Any idea as to which is more consistant and longer lasting for barrel shoot out.
__________________
Courage,Spirit and Honor
Pass It On
Reply With Quote
  #4  
Old 07-14-2002, 10:53 PM
Junior Member
 
Join Date: Jun 2002
Location: Birmingham, Alabama
Posts: 20
Re: RIFLING TYPE

Supposedly, both kinds of rifling are pretty consistent, but if I had to venture a guess, I would think that cut rifling is a little more accurate. This isn't based on any actual evidence, just a gut feeling.

And as far as which kind would last longer, I wouldn't think there would be any difference.
__________________
See you, space cowboy...
Reply With Quote
  #5  
Old 07-15-2002, 04:07 AM
Platinum Member
 
Join Date: Jun 2001
Location: Palmer, Alaska
Posts: 2,539
Re: RIFLING TYPE

Texas,
I saw my friend Erics 357 Sig H&K Poligonal barrel yesterday. They look cool. He said it was chromed too.

I think Dave King has a Poligonal bore in a rifle, can't remember what caliber if I'm even remembering correctly to begin with. He has some thing different like that though.
__________________
Brent Moffitt
Reply With Quote
  #6  
Old 07-16-2002, 07:53 PM
Gold Member
 
Join Date: Sep 2001
Location: North, Texas
Posts: 610
Re: RIFLING TYPE

Dave King do you have a rifle with polygonal rifling and if you do how does it shoot compared to some of your other guns? Also who did it for you?
__________________
Courage,Spirit and Honor
Pass It On
Reply With Quote
  #7  
Old 07-17-2002, 07:05 AM
Platinum Member
 
Join Date: May 2001
Posts: 2,369
Re: RIFLING TYPE

Yes, many of my rifles have polygonal rifing, I get them from Tac-Ord in Meridian ID, the barrels are from Pac-Nor.

The rifles shoot very well but don't particularly care for the solid alloy bullets (Barnes, Lost River, etc).

My 338 RUM is a 1x8 338, my 223 Rem is a 1x7 and most of the 308s I've recently had are 1x10. I've been told that the twist needs to be a little faster with the Polygonal rifled barrels.

Overall ALL my rifles are sub .5MOA rifles, some get into the .25MOA range on occasion.

For more info on polygonal call Jim Ryan at Tac-Ord (208) 288 1450.

Some/all of Lothar Walther barrels are polygonal too (I believe).
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: RIFLING TYPE
Thread Thread Starter Forum Replies Last Post
Harris type S Bi-pod swivel type Iron Worker Other Stuff For Sale 1 05-24-2011 09:00 AM
Why No 3R rifling?? elkaholic Gunsmithing 8 05-14-2011 09:45 PM
5R Rifling -Yes or No? Brown Dog Rifles, Bullets, Barrels and Ballistics 19 06-06-2010 03:04 PM
Obermeyer type 5-R rifling benchracer Rifles, Bullets, Barrels and Ballistics 5 01-14-2010 09:31 PM
Cut rifling vs button rifling locotrician Long Range Hunting & Shooting 40 10-01-2007 01:52 PM


All times are GMT -5. The time now is 07:38 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC