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Thread: carbon build up in 30 BR barrel

  1. #46
    Join Date
    Jul 2007
    Location
    S.E. MI
    Posts
    2,507
    Quote Originally Posted by shootsteady View Post
    I donít see any scratches in my barrels, so l cant go along with you. A 10 power maginifier is clear enough to not see any damage at the crown. And you have to realize the brush isnít touching the bore either, so whatís the problem? If You want to over analyze things be my guest. I had a bore that was badly pitted and shot the same as a pristine barrel.
    get your barrels one of these. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
    Keep in mind it is 20X.

    They even have one for pistols. https://www.amazon.com/Borescope-Cle...ef_=ast_sto_dp
    Plug into computer with Win 10. Win 10 has a camera program.
    I used to use a flashlight in my pistol barrels. Was bored one winter. Used the Hawkeye on a pistol. WOW! I was not getting them clean.
    So I now use the Teslong borescopes after cleaning on everything...

  2. #47
    Join Date
    Oct 2019
    Posts
    881
    they do not compare.
    more time of flight
    more time in the wind....wind maybe 30 plus feet above line of sight
    having said that
    bart has a 5 shot 600 yard record of about .3
    and i think there is a 1. at 1k that is probably 5 but maybe a 10.

    Quote Originally Posted by Pete Wass View Post
    In a new barrel with something they can see inside it with, like a bore scope, they will see straight scratch marks the lapping compound made. My memory sez they use 150 grit to lap barrels before they sell them. Those scratches don't last forever, however. The best Group Shooter ever to live said the first 600 shots through a barrel are the best ones. Perhaps it has something to do with those straight scratches??? Perhaps one could periodically cast a lap , apply the 150 and put the "New" back in they barrel

    Pete

  3. #48
    Join Date
    Nov 2006
    Location
    Augusta, Maine & Palm Coast, Fl
    Posts
    6,647

    That's tiny

    Quote Originally Posted by rsmithsr View Post
    they do not compare.
    more time of flight
    more time in the wind....wind maybe 30 plus feet above line of sight
    having said that
    bart has a 5 shot 600 yard record of about .3
    and i think there is a 1. at 1k that is probably 5 but maybe a 10.
    No question, Is the .3 after reducing it for the distance? Doesn't matter too much cause .3 is tiny @ that range anyway.

    Pete

  4. #49
    Join Date
    Oct 2019
    Posts
    881
    Quote Originally Posted by Pete Wass View Post
    No question, Is the .3 after reducing it for the distance? Doesn't matter too much cause .3 is tiny @ that range anyway.

    Pete
    no, actual measurment

  5. #50
    Join Date
    Mar 2019
    Posts
    63

  6. #51
    Join Date
    Oct 2019
    Posts
    881
    YES BUT
    the scoring committee sent it back as .311...still a record
    the 282 is the range measurement.
    ohh and a NO TURN NECK

    Quote Originally Posted by 1911Nut View Post

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