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Thread: PTR-91: Breaking in the barrel?

  1. #1
    Junior Member

    Join Date : Feb 2009
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    Default PTR-91: Breaking in the barrel?

    Greetings.

    I just bought my first of several PTR-91s, and am getting ready to hit the range. Is there any type of break-in procedure I should follow for the barrel, or should I just follow normal procedures at the range?

    Thanks.

  2. #2
    Unrepentant HKHolic
    Shattered Mind's Avatar
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    Nothing special... just shoot some rounds, let it cool, shoot some more and so on. Then make sure you clean everything, especially the bore. Chase the copper fouling out all the way.
    45acp... turning human garbage into useful fertilizer since 1911

    Auf gebeginning to fixin der gun mit grosse busen of der schpritzin lubrication allen over derfukin platz, mit das squirtin and squeezin oil in allen fukinholes.
    Ja, und racken und strokin das bolt as if gecrazygoing, yanken dat handle bak und forth, zwei hunnert times, ja?
    Ist neue, und its needing some brekkin in.
    Zo, BREKKIN ZEFUKIN THING IN!


    Certified MM leghumper...

  3. #3
    Senior Member
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    I think the last time I broke in a PTR91, I slow-fired 2 or 3 rounds and cleaned. Did that for 50 rounds. It's not really neccessary to go white-clean every round on it unless you have a match competition barrel.

    I also cleaned from the muzzle using a muzzle cap that came with my cleaning kit to protect the crown. It's not exactly "fun" to field strip the entire rifle for 20 to 25 cleanings.

    Ask 100 people, and you'll probalby get 100 different answers. The main thing is that you do not want debris building up in the barrel that could change the surface. What's happening during the break-in is little pieces of steel from the chamber, lands, and grooves are chipping off. The sharp edges chip because the material is not 100% perfectly homogenous, and also, the tool that cut the barrel has left small burrs and imperfections along the surface. All those little pieces and weak edges need to be removed. In a way, it's not much different from breaking in a car engine.

  4. #4
    Unrepentant HKHolic
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    Quote Originally Posted by DesertFox_1891 View Post
    I think the last time I broke in a PTR91, I slow-fired 2 or 3 rounds and cleaned. Did that for 50 rounds. It's not really neccessary to go white-clean every round on it unless you have a match competition barrel...
    Good post. I did the exact same thing as above with my PTR-91. Did it make a difference... I really can't tell. :D
    Owns HK and Glock Pistols.
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  5. #5
    Unrepentant HKHolic
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    I'll go with this... sound advise.

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  6. #6
    HKPRO PREMIUM PARTNER
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    Join Date : Dec 2007
    Location : UT
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    Keven at PTR emailed me this a few months ago about break-in:

    _________________________________________
    Breaking in your new PTR91 rifle

    Recommendations
    G3 or HK91 cleaning kit
    300 rounds of Remington UMC 150 grain FMJ

    1. 2 rounds - clean and let cool
    2. 3 rounds - clean and let cool
    3. 5 rounds - clean and let cool
    4. 10 rounds - clean and let cool
    5. 15 rounds - clean and let cool
    6. 20 rounds - clean and let cool
    7. Repeat step 6 until you reach 100 rounds

    We recommend putting 300 rounds of the ammo mentioned above before using any surplus ammo. Your barrel should be seasoned and good to go for many years to come. Best regards from the team at PTR91 INC.
    ________________________________________________

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