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One more question...

n/an/a Member Posts: 168,427 ✭
edited November 2005 in Perry Shooter Competition Shooting and Reloading Forum
My weatherby is shooting slightly to the right at 100 yards, pretty much dead on at 300 yards and few inches to the left at 500 yards. How is this possible?!?!

Eric
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Comments

  • bpostbpost Member Posts: 32,669 ✭✭✭✭
    edited November -1
    Rotational forces on the bullet as it flys down range.
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  • n/an/a Member Posts: 168,427 ✭
    edited November -1
    quote:Originally posted by bpost1958
    Rotational forces on the bullet as it flys down range.


    I had speculated that this might be the case...

    Eric
    allamericanarmsco@frontiernet.net

    All American Arms Company

    www.galleryofguns.com
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  • dclocodcloco Member Posts: 2,967
    edited November -1
    ...sorry ECC..but I cannot resist posting this reply.

    You are not following through with your shot. Beee the bullet...seeeee the bullet.....follow through with the bullet!

    Of course...just kidding.
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  • FrancFFrancF Member Posts: 35,279 ✭✭✭
    edited November -1
    Its following the curvature of the earth [:D]

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  • Shootist3006Shootist3006 Member Posts: 4,171
    edited November -1
    quote:Originally posted by ECC
    My weatherby is shooting slightly to the right at 100 yards, pretty much dead on at 300 yards and few inches to the left at 500 yards. How is this possible?!?!

    Eric
    allamericanarmsco@frontiernet.net

    All American Arms Company

    www.galleryofguns.com
    VIP Code: AAAC

    Veteran Owned and Operated


    Check your optics! Sounds a bit like paralax error. Of course a slight cross-wind will do the same thing

    NRA ENdowment, CRPA Life, Past President NRA Members Council
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  • nononsensenononsense Member Posts: 10,928 ✭✭✭✭
    edited November -1
    Eric,

    Another possiblilty is that either you when you hold the rifle or your scope is canted.

    Best.

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  • n/an/a Member Posts: 168,427 ✭
    edited November -1
    quote:Originally posted by nononsense
    Eric,

    Another possiblilty is that either you when you hold the rifle or your scope is canted.

    Best.

    rifleman.gif


    I had considered that as well. I'm going to shoot it again this weekend and pay a little closer attention to things. The thing is, it has done this ever since I bought it and I've had the scope off several times. Could the rotation of the bullet actually be the culprit here? thanks!

    Eric
    allamericanarmsco@frontiernet.net

    All American Arms Company

    www.galleryofguns.com
    VIP Code: AAAC

    Veteran Owned and Operated
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  • HighballHighball Member Posts: 15,755
    edited November -1
    Rotation shows up at long distance..so it could be that.

    Take a level to the range, and a long piece of butcher paper. Staple the paper up and draw a straight verticle line up the paper. (100 yard range)...place a target dot at lower end of line

    Fire a shot at the target dot..then 'come up' the 500 yard zero...fire again at target dot.

    If the scope is canted....the bullet will move away from the line.
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  • JustCJustC Member Posts: 16,056 ✭✭✭
    edited November -1
    The theory or effect some are trying to explain is called "Yaw of Repose" DISCLAIMER "This is a quoted formula from a person whom I highly respected and was eventually disgusted by some of the more lazy or ignorant members of another board and he had since been hard to contactin order to gain the exact data from your rifle and load it would take a multi million dollar lab, so this is a simplified version using a mid-point in BC, gyroscopic stability factor and conditions. Yaw of Repose is a result of a law of gyroscopic precession affecting a bullet spinning 180,000 or more RPM, being acted on by the force of gravity.

    any gyro (bullet) when unconstrained, will move 90* to the force acting on it. To see a rough proof, spin a top on the table and wait for it to stabilize, then gently blow on it, it moves away, then left or right depending on rotation direction. Right hand twist barrels cause the rotation to move right of the shooter.

    This is the formula that should get you within 1/4moa unless you are overstabilizing the projectile.

    [6(Y/200)(Y/200)] divided by 25.4

    Y= targets actual distance in yds

    the answer will be in inches of drift from a 100yd zero with NO wind.

    This is however only an apreciable factor when speaking in terms of LONG range shooting such as 1000yds and beyond.

    why chase the game when the bullet can get em from here?....
    Got Balistics?
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