Barrel break-in

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by rufous, Aug 11, 2007.

  1. rufous

    rufous Well-Known Member

    Messages:
    174
    Joined:
    Jul 17, 2001
    I am having Greg Tannel rebarrel my 300 Win Mag using a Broughton 5C barrel. I get such conflicting ideas on proper barrel break-in. I would be interested in hearing from you all what has worked for you. Greg suggests not using a bronze brush after the first shot, just patches and solvent (no Barnes' or Sweet's). Then swab bore with a patch that has 3 drops of Graf oil then fire a few shots and clean with bronze brush, solvent and patches and then apply Graf oil again and repeat until about 20 shots have been fired. Tim North of Broughton has a different method. I have been using Darrell Holland's Witch's Brew regularly on the old barrel but am not sure if it may have prematurely worn out my barrel. Do any of you use Witch's Brew? It is a mild abrasive. Thanks, Rufous.
     
  2. J E Custom

    J E Custom Well-Known Member

    Messages:
    7,310
    Joined:
    Jul 29, 2004
    Barrel breakin

    Rufous

    I would recomend talking to the barrel maker first and ask
    him/her (politically correct) what they recomend for their
    barrels.

    This is a much debated subject and there are many ways
    to do this.

    I recomend going slow not allowing the barrel to heat up.

    Clean between each shot and you will know when it's getting
    there because the barrel will get easy to clean and patches
    will go through the bore very smoothly.

    Normaly it takes from 15 to 30 shots on a premium barrel.

    Take something else to the range to shoot while waiting
    for it to cool between shots.

    Just my 2 cents
    J E CUSTOM
     
  3. Jeff In TX

    Jeff In TX Well-Known Member

    Messages:
    408
    Joined:
    Aug 10, 2003
    rufous,

    Barrel breakin is a waist of time effort and ammo. Broughton builds a great barrel which has already been hand lapped and no need for any non-sensense such as this barrel break-in myth.

    Just shoot it and enjoy it.
     
  4. J E Custom

    J E Custom Well-Known Member

    Messages:
    7,310
    Joined:
    Jul 29, 2004
    Barrel breakin

    Rufous

    Jeff may be right but after spending lots of money on a
    custom rifle I cant risk taking any short cuts.

    I use select match barrels only and they are all lapped
    and even then I can feel the bore getting smother and
    see the velocity going up slightly during breakin.

    All of my rifles are guaranteed to shoot under 1/2 MOA
    and have had no rejects.most shoot under 1/4MOA

    And with some load development some have shot under
    1/10 of a MOA."NOTE" I'm not bragging just stating why
    I'm hesitant to change so I break in all new barrels.

    Works for me so why stop now

    Besides It gives me a chance to get acquainted with my
    new baby.

    Just my 2 cents worth
    J E CUSTOM