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Non-chrome AR15 barrel break-in

Discussion in 'Rifle Country' started by distra, Apr 15, 2007.

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  1. distra

    distra Member

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    I assembled my first AR15 last week and would like to findout a "proper" (if there is such a thing) break-in for my non-chrom lined barrel. I checked out the Bushmaster site (mine is not a Bushmaster) and they recommend cleaning the barrel after every 20rds up 60 rds. Is this a good idea or a waste of time?
     
  2. The Deer Hunter

    The Deer Hunter Member

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    I heard you clean the bore every three shots for the first 20 shots, but I have also heard that "breaking in" a new bore is bs.

    But its not like it would hurt the barrel.
     
  3. Bartholomew Roberts

    Bartholomew Roberts Moderator Emeritus

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    Gale McMillan is a well-known name in the barrel and rifle business. Here were his thoughts on the subject:
    http://www.thefiringline.com/forums/showthread.php?t=12582&highlight=barrel+break+in

    I couldn't say myself on the subject; but unless you can shoot 1MOA already, I would not worry too much about it because a barrel break in is not going to give you dramatic changes in accuracy. Some suggest it might make cleaning easier - and my one barrel with a break-in process does clean nice and easy; but generally I wouldn't know enough myself to say one way or the other, so I tend to trust Mr. McMillan's words on the subject.
     
  4. mec

    mec Member

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    The bushmaster break in is a bit more lenient than some. I followed it with my predator, actually cleaning and decoppering a bit more frequently than they recommend. At first, I would get some blue/copper color on my patches but now that the break-in period is past, it takes a lot of shooting for any trace of copper to show up on the patch. I don't know for sure that the break-in drill is responsible but it sure didn't hurt/
     
  5. Quintin Likely

    Quintin Likely Member

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    Patch the bore a couple times and go shoot.

    Break in done.
     
  6. distra

    distra Member

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    Thanks Bartholomew. McMillan makes a lot of sense. I can see cleaning the bore with solvent, but not the bore paste. Hopefully, I'll get to the range this week to sight in my rifle.
     
  7. Geno
    • Contributing Member

    Geno Member

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    DPMS is the most strict I have ever seen...clean after every single shot, from round 1 through round 100. They caution that it may take up to 200 rounds to break the barrel in fully.
     
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