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6.5-284 140 Berger?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by .30 CAL, Aug 29, 2010.

  1. Aug 29, 2010 #1
    .30 CAL

    .30 CAL Well-Known Member

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    What would be the ideal chamber for a 140 grain Berger in 6.5-284. I'm looking for reamer dimensions. Thanks

    I know, I know it's not a .30 cal but hey it's not a 7 Em Em either :).
     
  2. Aug 29, 2010 #2
    elkaholic

    elkaholic Well-Known Member

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    I shoot The Bergers in my custom 6.5 Sherman and can give you some dimensions that have worked well in my application. I can push the 140's at 3200' but cases last a lot better at 3150'. This is with only a 26" barrel. I would recommend a .293" neck, then turn your brass to .013" thickness. This will give you .0015" per side for expansion.Throat and lead dimension is .2645" and is .160 and .174 long . The angle is 1 1/2 degree. I have a .300 neck length which is a little better than the 284 case. PM me if you want more info.......Rich
     
  3. Aug 29, 2010 #3
    codyki

    codyki Active Member

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    PTG built mine with 0.177 freebore for 140 bergers
     
  4. Aug 29, 2010 #4
    elkaholic

    elkaholic Well-Known Member

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    I realize that my .160, .174 dimensions were confusing. The freebore is .174.....Rich