30BR for 300 m/y with some constrains

Discussion in '6BR, 6BR Improved & Wildcats' started by raro, Mar 21, 2019.

  1. raro

    raro

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    First post here - all advises are highly welcome!

    I'm from Germany and looking for a benchrest rifle for 300 meter target score discipline.

    A possible candidate is a 30BR. But the issue is, that according to the German C.I.P regulation, a minimum freebore should be at least .157" (G-h = 4mm)

    https://www.cip-bobp.org/homologation/uploads/tdcc/tab-i/30-br-ge.pdf

    Therefore, the nice 112-118 BIB bullets, Robinett Reamer and 17 - 18 twist will probably not work here...

    So here are the questions:
    1. What bullets and what twist would you take?
    2. Is that even worth to try under these circumstances?
    3. If not - what could be an alternative in .308 boltface?

    Cheers
     
  2. BRGUY

    BRGUY

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    30 Bench Rest

    Speer 130 gr. Hollow Point

    1-13" twist rate
     
  3. raro

    raro

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    Wow, really prompt! Appreciate!

    What barrel length and contour would you recommend?
    Any candidates from Berger or Bart's 30th?
     
  4. BRGUY

    BRGUY

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    I shoot a 27" 1.250" straight tube.

    Freebore is .062

    My gun does not shoot either Berger or Bart's bullets, which is why I shoot those 130 gr. Speer bullets.

    300 yard average is 5/8" or less.
     
  5. raro

    raro

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  6. Rushty

    Rushty Silver $$ Contributor

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    Good alternative would be a 6BR, it has a .308bf and is very capable at 300..
     
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  7. raro

    raro

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    yes, this would be my second candidate
     
  8. Rushty

    Rushty Silver $$ Contributor

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    There’s good choices of bullets to from 80 to 108gns.. can go lighter also..
     
  9. raro

    raro

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    what would be a good choice in 6BR for FB .105 (CIP min)? I guess something around 100 Gr in 8 to 10 twist?
     
  10. KMart

    KMart Gold $$ Contributor

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    In a 6br, the Berger 80gr fb varmint is a very good choice. The bullet has a long bearing surface and you will be able to reach the lands with the .105 freebore minimum. A 10 twist should work just fine with the 80 Berger. It also works well in an 8 twist.
     
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  11. raro

    raro

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  12. bugman

    bugman Gold $$ Contributor

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    Care to post some photos of this "average"
     
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  13. North Fork

    North Fork

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    I have fun shooting the 125 gr Speer TNT in my 30 BR
     
  14. raro

    raro

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    to be honest, I was bit sceptical regarding the speer 125 in 30BR. The plan was to find a way to import BIB's or Cheeks or Bart's (which could be quite tricky now for europeans). Probably I should change my mind.
     
  15. raro

    raro

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    Update regarding CIP:

    I spent some additional time to analyse CIP pdf's more precisely, and now I'm tending to think, that Zero-FB is possible in CIP. The FB should be s, not G - h . It makes initial question obsolete and leads to the new ones:

    BR 300 yards with 30BR rifle:

    1. Twist 18 or 17?
    2. What Berger or Bart's or Hornady or XYZ could be used (instead of BIB's or Cheeks, which I'm not know for now how to get in Germany). Ok, one candidate is already mentioned above.
    3. Barrel length 24 or 26? Or something else?

    Thanks!
     
  16. KMart

    KMart Gold $$ Contributor

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    Berger makes a 30 cal 115 grain FB Target and they shoot well.
     
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  17. raro

    raro

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    17 twist should be ok for them, right?
     
  18. DCRYDER

    DCRYDER

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    17 twist, 22-1/2” barrel is plenty since you will be shooting fast powder (H4198 or RL7), Berger 115’s. Barrel contour at least HV or as heavy as rules allow.
     
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  19. raro

    raro

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    Weight is not an issue. Short barrel due to the burning rate of powder? I was thinking about 24-26”. Thx!
     
  20. josh shrum

    josh shrum Gold $$ Contributor

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    I would recommend Berger 115gr 30 Cal FB, 17 twist barrel @24", VV N130.

    There really is no need to go longer than 22 1/2 inches. That said, I have run a few 24" barrels in 30BR, only real advantage is that you have room to cut the tenon off and re-chamber it and end up with a 22 1/2" barrel if that barrel is particularly good.

    In either length, you will find that the Bergers like to shoot around 3000 FPS, which is easily achieved in either barrel length.

    It is the next best thing to impossible to fit enough powder into a 30BR case to get into a higher node. That is where you see people using a wildcat of the 30 BR like a 30 Dasher or 30BRX.

    If you have a way of getting a Tuner imported and on the rifle you will be in good shape.
     
    Last edited: Mar 25, 2019
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