Throat issuses

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by rdsewell, Jan 27, 2014.

  1. rdsewell

    rdsewell Well-Known Member

    Messages:
    101
    Joined:
    Jun 11, 2010
    Guys needing a little advice here. I just had a 6.5x284 chambered. And I told my smith I wanted to shoot 140gr. Bergers. I was looking in the Berger manual and the coal is 3.228. In my chamber with bullet touching the lands it's 3.085. I guess my question to you guys that know a lot more than me is will this effect anything other than case capacity or should I have my smith cut the throat to Berger specs?
     
  2. MagnumManiac

    MagnumManiac Well-Known Member

    Messages:
    1,002
    Joined:
    Feb 25, 2008
    Unless you supplied a dummy round for your smith to work off, how would he know what throat length to cut?
    Just because Berger list a certain COAL doesn't mean that's what will work in your rifle.
    Is your rifle a long action or a short action?
    What length is your magazine?
    Do you want to single feed or load from the magazine?

    There are many variables that need addressing, and most smiths, like myself, don't have working crystal balls. Unless we're given all the info, we can't just guess.

    Cheers.
    gun)
     

  3. AZShooter

    AZShooter Well-Known Member

    Messages:
    2,075
    Joined:
    Dec 12, 2005
    I helped a friend work up a load for his 6.5-284 last year. His OAL was far shorter than the 6.5-284 Norma sammi spec of 3.220" just like yours. It was put together to ber used as a hunting rifle using the magazine. There was no problem putting together a load and it was very accurate.

    You can work with what you have unless want a repeater and you have a long action then you could have the gunsmith lengthen the throat.
     
  4. rdsewell

    rdsewell Well-Known Member

    Messages:
    101
    Joined:
    Jun 11, 2010
    The gun is built on a long action receiver. Believe me guys when I say I'm not trying point a finger. I am just wanting to know is there any benefits to stretching the OAL to specs. Mainly group size, it shoots a 1" to 3/4" groups now. But it doesn't like a real hot load now.
     
  5. J E Custom

    J E Custom Well-Known Member

    Messages:
    7,307
    Joined:
    Jul 29, 2004
    Try backing off the lands, some barrels like more free bore and I have seen rifles shooting Bergers like .080 to .100 jump to lands for best accuracy.

    This will also lower pressure and increase velocity.

    The rule is, there is no rule when it comes to what a barrel likes.

    J E CUSTOM
     
  6. shortgrass

    shortgrass Well-Known Member

    Messages:
    1,992
    Joined:
    Mar 31, 2010
    What?! No magic wand, either?
     
  7. Edd

    Edd Well-Known Member

    Messages:
    2,394
    Joined:
    Jan 26, 2011
    I wouldn't want it that long. That would make it about 2 inches from the base of the case to the back of the bearing surface. That's about .100" longer than I would want.

    Your Gunsmith made it about .040" shorter than the maximum I would want. How long is it going to take for your throat to grow .040"?

    Krieger says it can grow up to .030" during break in.
     
  8. azsugarbear

    azsugarbear Well-Known Member

    Messages:
    1,150
    Joined:
    Sep 20, 2005
    JE - would you quit bursting my bubble? Every time I am feeling warm and cozy, you show up with a post that drags me out of my delusion and back into the real world.
     
  9. J E Custom

    J E Custom Well-Known Member

    Messages:
    7,307
    Joined:
    Jul 29, 2004

    I thought that was my job. Ha Ha

    Don't worry I have had my bubble busted more than once.

    J E CUSTOM
     
  10. rdsewell

    rdsewell Well-Known Member

    Messages:
    101
    Joined:
    Jun 11, 2010
    Many thanks guys, for all the input. JE I'm going to take your advice and just play with the seating depth. Because with it shooting 1"to 3/4" groups, I'm going to take my Grandad's advice "if it ain't broke don't fix it. :D