5-R Rifling ?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by REDHEAD, Feb 12, 2010.

  1. REDHEAD

    REDHEAD Well-Known Member

    Messages:
    251
    Joined:
    Jan 30, 2009
    Anybody know what this is and how good is it ?lightbulb
     
  2. 7mmRHB

    7mmRHB Well-Known Member

    Messages:
    338
    Joined:
    Jan 12, 2005
    Redhead, It's 5 lands and grooves with a slanted side on the land walls. The R is for Russian, the originators of the design. ( I read that somewhere ) There are lots of bbl makers doing their own version of this style.

    Rock Creek-- 5R = Russian
    Satern ------- 5S = slanted
    Broughton -- 5C = canted
    Shilen -------- Ratchet , and many others. I was told a few days ago that Kreiger was doing one now also but I don't know that to be true.

    They work well and claim to give higher velocity with less jacket deformation because of the slanted lands and the fact that there are no lands directly opposing each other in the bore.

    Lots of guys here on LRH are using these bbls with good results, I'm sure they will tell you why!!

    RHB
     

  3. Moman

    Moman Well-Known Member

    Messages:
    827
    Joined:
    Feb 7, 2008
    +1 with 7mmRHB. That's pretty much the way I heard it to. I only have one 5R barrel and it's in a 308 Win, but I have been so impressed with the way that gun shoots, I ordered a Brougthon 5C for my 300 WM. The barrel is being installed as we speak.

    As mentioned, the lands are not opposing each other with the odd number. I've always had an idea that was one of the main reasons why they are so accurate.

    I've also heard very reputable shooters on this and other sites say that the number of lands doesn't matter all that much. They all shoot good as long as you get a quality barrel. In either case, I have been very happy with mine.
     
  4. elkaholic

    elkaholic Well-Known Member

    Messages:
    5,345
    Joined:
    Dec 4, 2008
    I have a 5R Bartlein ordered for my 300 Sherman and can't wait to get it installed. Lonnie Hummel at Hornady shoots one in 1000 yd. competition and loves it. He says they are a breeze to clean because the copper doesn't stick as easily (less angle between the lands and grooves). I too have heard of greater velocity and less bullet deformation.. Makes sense!........Rich
     
  5. Bart B

    Bart B Well-Known Member

    Messages:
    2,483
    Joined:
    Dec 25, 2005
    I think Barret (Boots) Obermeyer first used this in his cut rifled barrels for the 7mm Rem. Magnum barrels. Sierra's jackets on their 168 gr. 7mm match bullets were thin enough to be weakened too much by conventional rifling; they came apart spinning so darned fast. Obermeyer dubbed it "5R" and the rest is history.

    I've used some 30 caliber 5R barrels from him in competition; great accuracy and decent barrel life.
     
  6. TOM H

    TOM H Well-Known Member

    Messages:
    1,112
    Joined:
    Dec 24, 2001
    Good barrels. I've got a Broughton5c on 300WSM,Bartlein 5r on 30-06 have another Bartlein 5r up gunsmith for a 280AI and Kreiger 5r coming for another 300WSM.
     
  7. Chas1

    Chas1 Well-Known Member

    Messages:
    3,547
    Joined:
    Feb 15, 2009
    Does anyone know whether or not there are a fair number of these being used in the BR community?
     
    Last edited: Feb 17, 2010
  8. James H

    James H Well-Known Member

    Messages:
    504
    Joined:
    Jan 15, 2006
    Chas,
    I think they are somewhat rare in short range BR. I know several people who shoot Bartlein 5R barrels for LR BR. I think they are somewhat common in F-Class too. I prefer the Bartlein 5R myself but they have a long wait to get one.

    James
     
  9. elkaholic

    elkaholic Well-Known Member

    Messages:
    5,345
    Joined:
    Dec 4, 2008
    The answer is YES!....Rich
     
  10. REDHEAD

    REDHEAD Well-Known Member

    Messages:
    251
    Joined:
    Jan 30, 2009
    Sounds like a touched a never. Thanks guys . If I ever get to being that good of shot and rebarrel , I'll consider it. Now what is " F " class competion ?lightbulb
     
  11. James H

    James H Well-Known Member

    Messages:
    504
    Joined:
    Jan 15, 2006
    "Belly Benchrest"
    Basically it is shot under NRA High Power rules but you are allowed to use a scope and a front rest.
    I'll let someone who has actually shot F-Class go into more detail.

    James
     
  12. cutrifled

    cutrifled Member

    Messages:
    24
    Joined:
    Aug 12, 2007
    Chas1
    There have been several National championships in both Varmint for Score and Hunter Class benchrest won in the last few years with our 5R barrels in 30cal.
    They have also set several world records with them also.


    Paul Tolvstad
    Rock Creek Barrels
     
  13. lomfs24

    lomfs24 Active Member

    Messages:
    26
    Joined:
    Oct 25, 2009
    On a slightly different but related note, what experience have people had or heard of with the Pac-Nor Polygonal twist barrels? Same concept I think except that there are no land and grooves just a polygonal twist barrel like a Glock barrel.