Inline FabricationLoad DataTitan ReloadingWideners
Reloading EverythingRepackboxMidSouth Shooters SupplyLee Precision
PBcastco
Results 1 to 13 of 13

Thread: Barrel fluting

  1. #1
    Boolit Grand Master FergusonTO35's Avatar
    Join Date
    May 2012
    Location
    Boonesborough, KY
    Posts
    6,877

    Barrel fluting

    So, I think I want to flute the E.R. Shaw stainless barrel on my .257 Roberts. ERS offers barrel fluting, I reached out to them asking if they could do it. Anybody know of another good source to have it done? The main reason I want to flute is weight reduction and also 'cause it looks cool.
    Currently casting and loading: .32 Auto, .380 Auto, .38 Special, 9X19, .357 Magnum, .257 Roberts, 6.5 Creedmoor, .30 WCF, .308 WCF.

  2. #2
    Moderator


    Winger Ed.'s Avatar
    Join Date
    May 2007
    Location
    Just outside Gun Barrel City, Texas
    Posts
    9,321
    If there is an old school gunsmith locally, that has a milling machine, it's not that hard of a project for them.
    In school: We learn lessons, and are given tests.
    In life: We are given tests, and learn lessons.


    OK People. Enough of this idle chit-chat.
    This ain't your Grandma's sewing circle.
    EVERYONE!
    Back to your oars. The Captain wants to waterski.

  3. #3
    Boolit Master TurnipEaterDown's Avatar
    Join Date
    Nov 2021
    Location
    SE MI, USA
    Posts
    576
    I would think that you would want to understand if the barrel is stress relieved before machining it for flutes.

  4. #4
    Boolit Grand Master FergusonTO35's Avatar
    Join Date
    May 2012
    Location
    Boonesborough, KY
    Posts
    6,877
    Thanks, will find out about that.
    Currently casting and loading: .32 Auto, .380 Auto, .38 Special, 9X19, .357 Magnum, .257 Roberts, 6.5 Creedmoor, .30 WCF, .308 WCF.

  5. #5
    Boolit Buddy HP9MM's Avatar
    Join Date
    Sep 2015
    Location
    Tallahassee, FL
    Posts
    106
    I always heard that fluting a barrel is just a way to remove money from your pocket.
    I think I see a rip in the social fabric, Brother can you spare some ammo?
    Corb Lund

  6. #6
    Boolit Buddy

    Txcowboy52's Avatar
    Join Date
    Oct 2016
    Location
    Somewhere between the Red and the Rio Grande
    Posts
    457
    Twisted barrel . I have used them a couple of times and they do great work! I believe they are located in Wyoming. Hope this helps.
    Keep your powder dry and watch your six !!

  7. #7
    Boolit Master Rapier's Avatar
    Join Date
    Sep 2020
    Location
    NW Florida
    Posts
    1,417
    I have fluted many barrels. Honestly, in my opinion, 99% of the time the only barrel fluting that should be done, due to the total cost and added chance of error, is at the time the barrel is contoured by the maker. It is cut to center and in the CNC lathe, little chance of error. Aftermarket flutes are cost prohibitive plus are error prone in the actual setup process.
    “There is a remedy for all things, save death.“
    Cervantes

    “Never give up, never quit.”
    Robert Rogers
    Roger’s Rangers

    There are three kinds of men. The one that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves.
    Will Rogers

  8. #8
    Moderator
    Texas by God's Avatar
    Join Date
    Mar 2016
    Location
    Texas
    Posts
    14,272
    I’ve used several ER Shaw barrels and most of their contours run on the heavy side. Especially in the over .30 caliber offerings. The chamber end has a longer area before the taper is part of it, I think.


    Sent from my iPhone using Tapatalk

  9. #9
    Boolit Grand Master


    stubshaft's Avatar
    Join Date
    Apr 2009
    Location
    Southernmost State of the Union
    Posts
    5,845
    Fluting a barrel does a couple of things. First it lightens a barrel while helping it maintain its stiffness and secondly, it provides more surface area to allow cooling. Both of which were needed in shooting Unlimited International Class Silhouette.
    Old enough to know better, young enough to do it anyway!

    Men who don't understand women fall into two categories: bachelors and husbands!

  10. #10
    Boolit Grand Master

    Join Date
    Mar 2013
    Location
    Northwest Ohio
    Posts
    14,382
    Barrel fluting can be a big plus allowing a heavier contour in a lighter weight, it also increases surface area to improve cooling (as does heavy bead blasting the surface).The other is it can shift the balance point of a rifle.

    If the blank hasnt been stress relieved I would have it done before fluting, to make the fluting job easier. Then again after to remove the stress introduced when cutting the flutes.

    Traditionally flutes were cut on a horizontal mill, This gave the gentle gradual in and out with the radius of the 3"-4" cutter. Once the table stops were set it allowed the smith to cut unattended doing something else. The only time he had to be there was to reset the table and to rotate the blank and start the next, With a running coolant it was hands off machining. It an be done in a vertical mill with a ball end mill but I dont think it looks as good, and the ball mill may produce more stress

  11. #11
    Boolit Grand Master



    M-Tecs's Avatar
    Join Date
    Apr 2008
    Location
    Minnesota
    Posts
    9,409
    Agreed the ball end mill is not the best option. For vertical mills these are a much better option https://pacifictoolandgauge.com/566-...cutters-nopix-

    I have a set of keyed slitting/slotting saw R8 abors that will go up to 1 1/4 cutter ID. They are easy enough to make also.

    https://rifleshooter.com/2014/02/how...-rifle-barrel/



    Back to the subject of fluting. Fluting reduces rigidity on the barrel being fluted. On a fluted barrel and non-fluted barrel of the same weight the fluted barrel will be more rigid due to the increase diameter. Fluting gives more surface cooling. Fluting is best done before rifling. If not, you may or may not decrease accuracy and increase barrel point of impact walking. Barrels like Krieger's are double stress relieved and I've never had an issue with them from fluting after the user decided the contour was too heavy. I've done some factory heavy varmint barrels that lost accuracy. I've done some that have not lost accuracy. I've never fluted a E.R. Shaw stainless barrel.

    In the 90's and early 2000's I was big into fluting. Now I just order the barrel blank contours that don't require fluting. While the increased surface area does increase surface area for cooling it did not increase usable accuracy life for NRA Highpower Match rifles in my experience.

    https://kriegerbarrels.com/faq#flute
    How does fluting a barrel help?
    Fluting reduces weight while increasing rigidity over an unfluted barrel of the same weight, ie: smaller contour. By exposing more exterior surface area, it also aids in cooling your barrel.

    On the barrel contours that we will flute, we expect the same practical accuracy out of a fluted barrel vs. an un-fluted barrel as long as it is fluted by us. A note on fluting done by others: We have researched and performed fluting using many different methods over the years and have really perfected the system we use. Like any other outside operations performed on our barrels, we will not be responsible for the results of other methods of fluting performed by gunsmiths/machinists other than Krieger Barrels, Inc.
    Last edited by M-Tecs; 10-02-2023 at 03:00 AM.
    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

    "Before you argue with someone, ask yourself, is that person even mentally mature enough to grasp the concept of different perspectives? Because if not, there’s absolutely no point."
    – Amber Veal

    "The Highest form of ignorance is when your reject something you don't know anything about".
    - Wayne Dyer

  12. #12
    Boolit Grand Master



    M-Tecs's Avatar
    Join Date
    Apr 2008
    Location
    Minnesota
    Posts
    9,409
    Last edited by M-Tecs; 10-02-2023 at 12:43 AM.
    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

    "Before you argue with someone, ask yourself, is that person even mentally mature enough to grasp the concept of different perspectives? Because if not, there’s absolutely no point."
    – Amber Veal

    "The Highest form of ignorance is when your reject something you don't know anything about".
    - Wayne Dyer

  13. #13
    Boolit Grand Master FergusonTO35's Avatar
    Join Date
    May 2012
    Location
    Boonesborough, KY
    Posts
    6,877
    Thanks guys, you've given me alot to think about.
    Currently casting and loading: .32 Auto, .380 Auto, .38 Special, 9X19, .357 Magnum, .257 Roberts, 6.5 Creedmoor, .30 WCF, .308 WCF.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check