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Thread: Defect in McMillin Stock on My GAP

  1. #51
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    Quote Originally Posted by Pappabear View Post
    That scares me. I have the crustiest fkn mounts on the planet, and cans and ....I just recently started pulling my cans off each week. Because I fused my TBAC can with a couple hundred rounds not long ago.

    PB
    It's not anything crazy, but my 1/2-3/4 MOA clean and around 1 when it's cruddy.


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  2. #52
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    Quote Originally Posted by Sensei View Post
    Hmmm, I'm following the recommended break-in that GAP specifies for their guns.

    http://www.gaprecision.net/ga-precision-download.html

    It happens to be virtually identical to the break-in that AI, Nosler, DesertTech, and Surgeon recommends.

    http://www.accuracyinternational.us/...ANUAL-AXMC.pdf Page 43

    https://www.nosler.com/blog/news-and...k-in-procedure

    Do you know something that the rest of us don't?
    Quote Originally Posted by Sensei View Post
    OK, I think there is a miscommunication issue. This is an initial barrel break-in as described in the manuals for the PRECISION rifles that I own. It is NOT a routine cleaning schedule, and it is not something that I do for my ARs. Virtually every custom precision rifle manufacturer and ammunition producer recommends a break-in procedure for the first 25-50 rounds depending on the tendency of the barrel to accumulate copper. I have provided links to those shooting schedules in my previous post but they all generally look something like this:

    1) Clean after every round for the first 10-12 or until copper fouling lessens
    2) Clean after 3-5 rounds until copper fouling lessens
    3) After a total of 30-50 rounds you will notice minimal fouling between groups and the barrel is broken in.

    This break-in procedure is largely done to prolong barrel life, but MAY also help with accuracy.

    As for my usual cleaning regimen once a barrel is broken in, it depends on the rifle and its tendency to accumulate copper and fouling. Some of my 308s will go 75-100 rounds before I detect a change in accuracy. My 300 WMs and 338 LMs are more like 40-50 rounds but every barrel is different.

    i think tylerw02 is also trying to say, while the break in procedure may be outlined by GAP, they are not shooting the gun for groups DURING that break in procedure.

    i don't even like breaking my cheekweld while shooting for groups, that's not to say anything about running liquids through the barrel, letting them sit and then nylon brushing.

  3. #53
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    Today was chrono day at the range. 5 rounds of Federal 168 grain GMM produced 2669 +/- 21 fps unsuppressed. Adding a SF SOCOM-2 suppressor yielded 2693 +/- 7 fps. Extreme spread off a bipod and rear sandbag for 5-shots is still right at 0.5" at 100 yards with the suppressor, but POI was shifted due south by 0.2 mils.

  4. #54
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    That's good data. Solid shooting. Good to see the can tighten it up. May indicate that gun would like a hotter load. Wonder how Black Hills would do? They probably have pretty good 7.62 ammo.

    PB
    "Air Force / Policeman / Fireman / Man of God / Friend of mine / R.I.P. Steve Lamy"

  5. #55
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    If FGMM isn't doing it for you, I'd look at Prime ammo. Very consistent.

  6. #56
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    Prime 6.5 is good stuff. It damn their shipping charges are killer.

    I would wait and buy a case when they do free shipping.

    In .308 I have always seen the 175 FGMM do great.


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