reamer dimension for 6.5/284

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by PrimeTime, Aug 8, 2001.

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  1. PrimeTime

    PrimeTime Well-Known Member

    May 9, 2001
    I know there are 2 main neck sizes for reamers, .290 and .296. My question, is one size for Norma and the other for Winchester?
    I have heard that the Winchester brass is actually better but would like more opinions on this matter.
  2. 10X

    10X Well-Known Member

    Aug 12, 2001
    i use winchester brass an as long as u are prepared to check every case for uniformity it is fine.i dont know any one who uses the norma brass.
  3. Steve Shelp

    Steve Shelp Well-Known Member

    May 3, 2001
    yes the neck diameter is important but that is can easily be adjusted with a good neck turner.

    The biggest problem between the Win and Norma brass is the case head diameter not the neck diameter. I believe the Norma brass runs a .001 or .002 larger. So if your reamer/chamber was cut based on Winchster brass dimensions the Norma brass won't fit into your chamber. I don't own a 6.5-284 but shoot with enough guys that do that this is a fairly well known "problem". I would hve to double check to maake sure that it's the Win brass that is bigger. Don't quote me, jsut be aware there is a difference. Don't know how the new Lapua 6.5-284 measures yet though. Also Hornady is making this brass to give you another option.

    hope this helps,