215 Hybrid Q's

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by rafterfp, Jul 13, 2015.

  1. rafterfp

    rafterfp Well-Known Member

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    New Barrel inbound, any suggestions on a reamer config for 300WM shooting the 215 Berger's? Thks
     
  2. Broz

    Broz Well-Known Member

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    Minimum spec on throat. .100" longer throat than a PTG "Tactical Match" reamer.

    Jeff
     
  3. rafterfp

    rafterfp Well-Known Member

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    Broz,
    Thks so much for the info, was hoping you would chime in. Do you think 2900fps is a realistic expectation with these out of a 28 inch 4 groove Bartlein?
     
  4. BEEMAN

    BEEMAN Well-Known Member

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    I used the specs that BROZ gave you for a 300 WM build this past winter. I believe we added 150 thou more free bore to mine. Mine shoots the 215's at 3000 fps out of a 26" Brux, Holland brake, Borden action on a Mcmillan A3 with Nosler brass. Start them 30-40 thou off. I am using H1000 and started at 73 gr and worked up.
     
  5. Broz

    Broz Well-Known Member

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    Yes, 2900 should be a very realistic MV and easy from a 28" with H-1000 in WW brass, or brass with equivalent case volume.

    I personally am not all warm and fuzzy about 3 and 4 grove barrels with this bullet though. Might all be in my head but I don't like the idea of larger or deeper inscription to the jackets that some of these barrels can induce. I have never seen it in 30 calibers, but believe in smaller calibers with tighter twists and more velocity, that jacket inscription from 3 and 4 grove barrels could lead to explosive results on impact. But this is not strongly documented and is probably more of an opinion than carved in stone.

    Jeff
     
  6. rafterfp

    rafterfp Well-Known Member

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    Jeff,
    I've got a 5r in the same barrel In sendero contour, I'll just save the 4 groove for my old 06 when it's ready. Thks for the advise! Really appreciate the help fellas.
    Frank
     
  7. Broz

    Broz Well-Known Member

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    That would be my choice providing it is a 1 in 10 twist. My barrel is a Broughton 5C 28" Sendero contour and I get over 3000 fps with H-1000

    Jeff
     
  8. rafterfp

    rafterfp Well-Known Member

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    It is a 10 twist. What Is your COAL on your 215 load? Will I need an extended mag box?
    It's a R700 mag action.
     
  9. Broz

    Broz Well-Known Member

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    Mine is .100" shorter than I wanted. Thanks to the PTG "Tactical Match" being actually shorter in the throat than a new off the shelf Remington Long Range by .040" :rolleyes: So my measurements of this rifle will not help you. But if it were me I would put the extended mag box in while I was doing it just incase I ever needed it.

    Jeff
     
  10. BEEMAN

    BEEMAN Well-Known Member

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    Get the extended box. I am at 3.962!!
     
  11. rafterfp

    rafterfp Well-Known Member

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    Gotcha, thks for the info.
     
  12. Edd

    Edd Well-Known Member

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    That means you only have .013" of bearing surface in the case neck. And that is with a maximum spec case. At the minimum spec, your bullet is just laying in front of the case. I think you need a new yardstick.
     
  13. rafterfp

    rafterfp Well-Known Member

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    Sounded long to me to, the wyatts extended box is only like 3.810 if I remember correctly.
     
  14. Edd

    Edd Well-Known Member

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    They have a center feed that is 3.990" and a 3.825" in a center feed and a standard box. The 3.825" box is plenty long for a 300 Win.