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Holdover/under Vs Scope Move

Discussion in 'Anything Airgun Related' started by SP99, Jan 6, 2021.

  1. SP99

    SP99 Well-Known Member

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    Have to bear with me in this as my explanations may be slightly vague/simple but hopefully you’ll get the gist.

    is it preferable to zero to one average range and just get used to your holdover/under. Or is it better to find a few zero’s at different ranges using the scope turret and mark them with stickers etc. And adjust as necessary?

    ive heard that continually adjusting using your turret could move youre point of impact, which I’m effect renders this method completely pointless anyway?.....

    please try keep your answers relatively simple bc I’m still learning the terminology ;)
     
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  2. Chouchin66

    Chouchin66 Major Poster

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    As best I can...
    I find it much easier to zero at a given distance & use holdover( not much under) the way I do it. Look through Chairgun...ie. My .20 HW50 has a near zero of 9 yards/ far zero of 27 yards, ( crosshairs in same spot on target)This gives me a point blank range of 30 yards( place crosshairs dead on ) at any distance between 9 - 30 yards = hit( kill zone of .80")... This means my pellet will neither rise , nor fall more than 7/16" from line of sight. Not all scopes (until high( er)end will track w/ turrets reliably. So , a hold over/ under approach ( I feel) is best. Put accurate data( scope height most important ) into Chairgun...test & confirm your aim points.
     
    Last edited: Jan 6, 2021
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  3. TrickyDicky

    TrickyDicky Life in the slow lane

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    The simple answer is whichever feels best for you try both methods, the only proviso is that you can't skimp on a scope if you intend to click it needs to be a tried and tested model that will always return to zero.
     
  4. SP99

    SP99 Well-Known Member

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    cheers for that, I’ve had a look at ChairGun, for someone relatively new to the sport like myself it’s MEGA confusing. If anyone could simplify the basics of what I should be putting in. That’s be great
     

    Attached Files:

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  5. TrickyDicky

    TrickyDicky Life in the slow lane

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    There are those that swear by Chairgun but not being one of them I would always err on the side of pursuing the methods that you feel the most comfortable with and remember it's all about enjoyment.:)
     
  6. PAUL4BE

    PAUL4BE Engaging Member

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    Most important questions around this are what type(s) of shooting are you intending, and what is the scope etc?
     
  7. Chouchin66

    Chouchin66 Major Poster

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    O.K. buddy, Here goes...
    First- muzzle velocity( a chronograph is a necessity)for keepin tabs on a rifles performance & velocity w/ various pellets - a must have!
    Second: an accurate scope height above C/L of muzzle...here's how...
    Turn scope to lowest magnification, & lowest paralax setting, place a piece of aluminum foil over front lens( objective lens) - in foil , pierce a small hole, next, place apiece of card W/ a cross near as can to muzzle, sight on center of cross & fire a pellet.
    C/L of pellet hole - C/L aim point is scope height above muzzle.
    Enter scope height, muzzle velocity _ pellet weight into Chairgun...
    Start at , say a 25 yard zero, hit " toolbox/ optimum zero range ...this gives a " kill zone". Adjust zero accordingly to your desired kill zone ( I use between 0.6 & 0.8")

    Have fun brother!..hope I helped

    P.S. - the clicks button, use it to match YOUR scope's set up - ie. 1/4" at 100 yards , etc.

    .
     
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  8. SP99

    SP99 Well-Known Member

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    Get the gist of what you’re saying, ‘CL’ is what? Then I’ll be able to understand fully

    cheers
     
    Chouchin66 likes this.
  9. Stockscrew

    Stockscrew Posting Addict

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    Using the turrets to adjust your zero for different ranges is what target turrets were made for. If you have a reasonable quality scope the turrets should return the reticle to its previous or another position on alteration. If you prefer this method, download the free version of Strelok on your phone, zero your rifle to 30yds and set your turrets by releasing them from moving the reticle, to Zero. Put in the relevant data required by Strelok and away you go, stickers not required. The info given on Strelok may seem a lot to remember but by its use it will become familiar or write it in your scope cap.
     
    SP99 likes this.
  10. Scubashot

    Scubashot Busy Member

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    C/L in this case is the centreline of the barrel.
     
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  11. TORNADOS7

    TORNADOS7 Top Poster

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    Much depends on what shooting you're doing buddy, if you're static hunting (from a hide) or target shooting at a pre determined distance then set scope accordingly, on the other hand if your going walk about (stalking) then set at your preferred zero (20, 25, 30yds etc) and either try to maintain that distance or learn yer hold-overs/unders... :thumb:

    Only you can decide which method best suits your circumstances at any one point in time...
     
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  12. R10 Rich

    R10 Rich Busy Member

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    I have been messing around with stickers on my turrets. I prefer to aim with the cross hairs rather than use hold over and under.
    Set my zero to 30 metres then found my marks for 20, 40, 50, 60, yet to do 70.
    As someone mentioned it depends on scopes as the ones on my guns are all different and I am surprised how different they are.
    When I shoot at local range I set targets at 45, 55 etc and then use a small amount of hold under/over.
    It all makes good practice for someone with under a year of shooting experience.
    Not sure if I will stick to this method but it gives me a task to do at range and hopefully will gain me knowledge
     
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  13. Scubashot

    Scubashot Busy Member

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    The procedure outlined by @Chouchin66 is to provide an accurate value for scope height.
    As the centrelines of the scope and barrel converge, rather than lying parallel, you can't just measure the height of the scope above the barrel.
    You actually require the height of the sightline above the barrel centreline, at the muzzle, to enter into Chairgun for scope height.
     
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  14. pjgtech

    pjgtech Top Poster

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    As others have said, if using scope adjustment / turrets, you will need a good quality scope, as not all (especially cheap scopes) will return to the same place / zero.

    Chairgun, etc are useful to see what sort of zero, kill zone, power, speed, etc you will get, but relies on inputting the correct data, (see post re: setting the correct scope height above), I think a lot of peeps think this is the height above the scope rails, not from the muzzle CL, which it should be!

    Also, to double check zero, put out some target cards at 5m distances, eg: 15m, 20m, 25m, 30m, 35m, 40, 45m, etc and actually shoot those targets and note where the pellets land, obviously do it indoors or on a fairly wind free day!
    This will show you what your gun / pellet is actually doing and will also help you with your aim points for hold over, hold under...

    Above all, enjoy it.... :thumb:
     
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  15. Chouchin66

    Chouchin66 Major Poster

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    C/L = center line( of muzzle)

    .
     
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  16. Chouchin66

    Chouchin66 Major Poster

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    Thank you for clarifying that mate, some times I'm not the best at explaining stuff, easier ( for me) to show someone...it's a Carpenter thing

    .
     
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  17. rabbitwrecker

    rabbitwrecker Black Latex Matters...

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    Fixed zero point, then holdover/under where needed. Chairgun and similar can give you a rough idea of what you should be doing, but never rely on an app - practice and learn where you and your rig are hitting at various distances, there's no substitute for real-world experience...
     
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  18. magicstu

    magicstu Well-Known Member

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    For me it’s hold over. I simply went to the range. Shot targets aiming dead on at 5meter ranges between 10 and 40m. Then transfer that to my reticule points (mil dot etc). Shot another target to confirm hold over poi is correct. And transfer the aim off points to my range card for the ground I’m shooting. As in :
    barn edge to hedge is 0.5 mil hold over.
    If that makes sense.
     
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  19. SP99

    SP99 Well-Known Member

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  20. 32:1

    32:1 Yea, I like it

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    If hunting you may not get time to rangefind, twist turrets and then shoot ;)

    Simply set your zero and learn your holds Id suggest, and remember that either of these methods are only as good as your ranging

    Enjoy the ride


    Chris
     
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