Do you guys dial in for spin drift?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by CRNA, Apr 26, 2011.

  1. CRNA

    CRNA Well-Known Member

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    Read an article a few weeks ago (can't remember where) about spin drift. Do you guys routinely correct for this? From what I read, I recall the article stated that for a RH twist barrel, a shooter should compensate appox. 1MOA at 1000yds. I know that when I shot at 1000+ recently (first time ever), I did notice that the first impact was way to the right out of my RH twist barrel. I did have some L to R wind, but there wasn't really a lot. Just wondering what you guys do.
     
  2. load

    load Well-Known Member

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    yupgun)
     

  3. Michael Eichele

    Michael Eichele Well-Known Member

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    +1. It always gets factored in.
     
  4. justgoto

    justgoto Well-Known Member

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    I don't usually shoot all that far, but since I shoot at small targets I do adjust for it.
     
  5. CPGfan

    CPGfan Well-Known Member

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    I always sight my rifle in .5 to .75 Moa left of my aim point so it is basically already accounted for when I get out to distance. So with most of my rifles with a 200 yard zero I am about 1.25" high and .75" left at 100 yards. This method has always worked very well for me with several critters harvested from 800 to 1000 yards.
     
  6. trout-n-salmon

    trout-n-salmon Well-Known Member

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    I am not a long range expert like a lot of the fellas on here, but on all of my range cards I have spin drift and wind holds listed. I make the elevation drop adjustment first, then adjust for spin drift, and finally wind. I make the first two adjustments as they are constants and will always be "X" and "Y" at a given distance. Then try my damnest to gauge the wind and make those adjustments. If all went well, I hit what I was aiming at.
     
  7. sp6x6

    sp6x6 Well-Known Member

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    I just shot today with a 1000 yrd. bench buddy. He figured it in, he was doing group work and seating by hand pressure with a micro seat. NOW I might not recall this right but if he had wind from the left, he said the bullet would climb and opposite for right, related to spin of bullet. He is shooting 103 gr. 6mm, so has to deal with wind alot.
     
  8. load

    load Well-Known Member

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    from right to left high, left to right low. think of the way the bullet is throwing the air as it spins.
     
  9. load

    load Well-Known Member

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    here is a chart
     

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  10. CRNA

    CRNA Well-Known Member

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    Thank you guys for the info. So how much do you adjust for it? Is it necessary only at a certain range? Am I correct in thinking that it equals about a MOA at 1000yds? If so, would I dial in 1/2MOA at 500? The chart posted above is really helpful as well, thanks.
     
  11. load

    load Well-Known Member

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    how much depends on a lot of things (bullet bc, spin rate, caliber, direction of wind exc)but a good place to start is for every 4 clicks of wind input 1 for spin correction. shoot your setup in the wind and figure from there what it is doing in the real worldgun)keep notes
     
    Last edited: Apr 27, 2011
  12. LR3

    LR3 Well-Known Member

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    Crna , yes 1moa is a good start. I setup with 3"inches right at 300yds and for my one rifle it works but be sure your your scope is level with the receiver. One rifle is setup with a scope tilt to compensate for spin - difficult to get right - about one minute of tilt on a watch .
     
  13. sp6x6

    sp6x6 Well-Known Member

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    tHANKS, Figures I'd get it bass ackwards:)That bench guy I went out with gave me overload. Got to watch him work on loads and shoot a 7/8 vert. x 2 7/8 horizontal 5 shot@ 1003, twice.Made me think I should dig a hole and bury my gun. He would shoot 5 in8-10 seconds.IT REALLY WAS A TREAT FOR ME.
     
  14. load

    load Well-Known Member

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    dont get discouraged theres alot to learn remember and experiance. i'm no pro and am still learning myself. some days i do great others i'm left scratching my head. i do love the sportgun)