Jump for Solid Bullets

Discussion in 'ELR, Ballistics & Bullets Board' started by 6ShotsOr5?, Feb 5, 2018.

  1. 6ShotsOr5?

    6ShotsOr5? Gold $$ Contributor

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    Some of the solid bullets have some impressive BC’s and seem to be used by a fair number of extreme ELR shooters. I’ve heard some say that these very high BC solid-copper or solid-brass bullets like some jump for best accuracy - maybe more than other bullet types. For those shooting these solid bullets, what bullets and what jump is working best for you?
     
  2. VaRandy

    VaRandy Silver $$ Contributor

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    I am doubting this ends up as the consensus.
     
  3. 6ShotsOr5?

    6ShotsOr5? Gold $$ Contributor

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    At this time I'm more concerned about apathy than consensus.
     
  4. wi50

    wi50 Silver $$ Contributor

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    A lot will depend.on the bullet and the chamber combination. But used to get out and shoot a few 50 cal matches a year and at times I was jumping .400" and having good luck. Yes, that's .400". But that was because of the combination of components and what I had to work with. However now with different bullet design I'm in the more "normal" range like the small caliber stuff is. I haven't been able to get away, but last year I sent my rifle with a friend and he won the class he shot in at the FCSA worlds, so it must work.
     
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  5. dellet

    dellet

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    Probably depends more on your expectations and ability than anything else. My ability as a shooter, loading and the rifles I own are basically MOA out to 300 yards.

    I have shot some of the Barnes bullets any where from .005"-.250" jump and been able to hold that size group.

    Using a G9 308 bullet with a .008" jump I have had some 1/2 MOA or better groups in a bolt action. Same bullet different rifle, 8" AR, jump is closer to .200" to fit it in the magazine. Best groups there have been 3/4 MOA.

    I would be hard pressed to say if the results were the fault/luck of the munitions department, the armorer, or the shooter. Because having the same guy on the top of his game in all three areas doesn't happen very often.

    The bullets seem more capable of adapting to change than I am.
     
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  6. normmatzen

    normmatzen Silver $$ Contributor

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    I don't know how relevant this is, but I switched from 162gr A-MAX to Barnes TTSX 140 gr. my gun is a 7X57.
    I couldn't get it to shoot worth a darn with TTSX and the old A-MAXs shot lights out!

    Read in a hunting forum that solid Barnes need to be seated deep. So, I pushed them in till the COL was less than usual recommended and the Barnes out shot the A-MAXs.
     
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  7. LA50SHOOTER

    LA50SHOOTER

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    Good Day Sir,
    What caliber(s) in specific are you wondering about ?
    Also, are you concerned about Bore-Rider Type solids ? - Or Full diameter ?
     
  8. 6ShotsOr5?

    6ShotsOr5? Gold $$ Contributor

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    .338” caliber. 24” 1:9.3 twist. Warner Tool, 255.5 gr Flat Line projectiles. If it means what I think — it has “drive bands” — it’s a bore rider.
     
  9. LA50SHOOTER

    LA50SHOOTER

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    I would start out up close with a bore-rider type projectile. - Possibly you could measure on it a bit to determine the exact dimensions. - The idea of the bore-rider projectile is to get the front (which should be under the size of the leade / throat) up into the leade / throat area which should facilitate good bullet to bore alignment. - I have no experience with the Warner projectiles.
     
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