struggling with holdover

[bb89 0]

is there an easy way to determine holdover? I have researched it a bit but can't find a straightforward answer..

 

for example, if my rifle was zeroed to 30yards which mil dot would I use to shoot something at 40yards?

 

is it just a case of target practice and trial n error to find holdover?

[davyt63 1,845]

is there an easy way to determine holdover? I have researched it a bit but can't find a straightforward answer..

 

for example, if my rifle was zeroed to 30yards which mil dot would I use to shoot something at 40yards?

 

is it just a case of target practice and trial n error to find holdover?

 

what cal is your rifle?

 

these will help http://www.thehuntinglife.com/forums/topic/234650-free-printable-hft-zeroing-targets/

 

Davy

Edited January 25, 2012 by davyt63

[zini 1,939]

Hi mate it depends on many factors:

 

Calibre, pellet type and weight, zero range, ballistic coefficient of the pellet, scope mount size and scope magnification etc.

 

It all sounds complicated but its a really easy process to calibrate your own rifle and scopes hold over and under points without worrying about the above factors.

 

Ill PM you a link and a tutorial of how to do it the easy way.

 

Si

[Phantom 631]

As the guy's above say Si's instruction and tuition is second to none

 

If you know the power of your rifle and want to visualise what you will be doing and how it works at different Magnifications then Download Chairgun Pro and play.

 

Si's Calibration Technique is probably the most accurate and reliable, but CGP helps re-enforce what happens and how it all works.

 

Tony

[zini 1,939]

Thanks Tony bud .

 

Pm sent BB89.

 

Regards

 

Si

[Phantom 631]

No need for thanks Si!

 

What you showed me in Germany just can not be matched, let alone beat!

CGP helps a person understand with ease whats going on; but for accuracy, Calibration just can not be beaten!

 

Tony

[Elmer_Fudd 28]

i also struggle here... would a rang finder drastically help? ...

many thanks

 

Gaz

[ghillies 209]

heres a long winded... http://www.thehuntinglife.com/forums/topic/233894-set-your-gun-up/

 

but basically you have to set up a few targets or something and literaly shoot at them, and watch through the scope to see where its hitting in relasion to how far or near it is, write it down(this developes your 'follow through' which helps a lot), and measure out the distances in 5 yard intervals...out to say 50 yards, 55 if your up to it.

 

most important though, if you zero at the nearest zero it'll vary a lot from zero to zero to where on your ret the pellets hit on the dots etc.(so 30's a better distance).

[Phantom 631]

A range finder will help teach you (Or give yous specific) ranges, but will not teach you "Hold over/under"

If you Zero your gun at say 30 yards and your scope is at 10x then depending on power or Muzzle Energy and BCF of pellet then you may find that you need maybe 1mildot hold over, or if using a 30/30 duplex reticle a quater inch or half inch hold over.

If you use Si's instruction, then you will know exactly where to put the cross hair of the reticle no matter how far away the target is and what magnification to use. If you use a different magnification then the amount of hold over/under will change.

It's kind of complicated to explain in writing, however once you've followed Si's instructions at different magnifications it all falls nicely into place

As I mentioned earlier download Ghairgun Pro from Hawke optics website and use it to help you understand the dynamics of airgunpellet trajectory. It's a fantasic tool to get he principles across Then do the calibration shoot and everything falls into place.

[bb89 0]

thanks for all the help, and the pm (si)

will read through then get out and practice.

 

my gun is at the shop atm so i am playing with my friends webley. this may be a daft question but both are .22 air rifles, using the same pellets will holdover/under vary between the two rifles?

 

[deano26 16]

Yes i should think so as the same pellets may react differently in different barrels, and also the power may be different in both rifles...........I am no expert but that's what I would think?

[Phantom 631]

Yes it will, maybe not by much but could be the differance between a clean kill and a miss or worse a wounding of the quarry.

This is why we all get used to our own gun's and get to know them almost intimately, then borrow another gun and wahaaayyy "how the ell did I miss that" lol

 

Nothing wrong with getting used to a few different guns though

 

Tony

[ghillies 209]

theres no getting away from a couple three facts about arguning.

 

1. it isnt hi velosity bullet blasting.

2. without accuracy its a big nothing.

3.every ones different, each gun is differing..(scope height, power, trigger, stock, barrel etc etc etc).

 

you have to try it out to see where it hits. choise A is pay out endlesly for 'other peeps' to feed you gossip and red herings etc, or choise B, go shoot some where and look at whats happening.

 

end of the day you can shoot 'blindly' and gues where it'll hit, from there try and remember 300 odd days with umpty seven shots on each f those days.

 

or......every 5 yard put a target, even if ts peice of wood, a can..what ever, and shoot them. this way in less than 30 minutes you know where on the ret.. but most importantly, you know where the target is, thats your distance perseption developing.

 

add the fact that an airgun is only of use if it's acurate enough..and of course you can 'gues' how far away it is.

 

the rest is time in on the mii range...then after equating the diferences in light basicaly when you do it for real.

 

the bigest bogus is 'set up at 30 yards zero' followed by 'at 15 yards the cross hair is on'...........total bollox! you cant know that, untill you fire the thing and see where. (i'm guessing here but in .177 most zero's i've used are distance to prey governed, and pellet depedant, and all are power related.. 34 yards, 37 yards, one 45 yard zero.. 24-27 yards for near ratting with a low sight...the list goes on. in .22 always turned up at 26-36 yards mid way stuff...beyond the 40 yards shooting in .22 i just switched back to a familular .177...)

 

buy a 50 meter tape measure. get a couple tins of pellets but dont just wong a load off, take 3 or 4 at each distance, easiest way is one shot to see, one shot to hit, 5 yard 10 yard 15 yards out 55.. right it down, relax into your pace, it's all about you shooting at your pace bud... but most importantly is a good accurate zero distance figure.. a foot diference sets the ret pattern some where else.

(best thing you'll ever do...).

[paulk73 151]

Hi mate it depends on many factors:

 

Calibre, pellet type and weight, zero range, ballistic coefficient of the pellet, scope mount size and scope magnification etc.

 

It all sounds complicated but its a really easy process to calibrate your own rifle and scopes hold over and under points without worrying about the above factors.

 

Ill PM you a link and a tutorial of how to do it the easy way.

 

Si

 

hello si. could i trouble you for a pm containing the same link please. cheers

[robwelsh 354]

i wouldnt mind that pm either si, im finding it more difficult with the AO scopes i have than the normal scopes iv used in the past..dont know if it makes any diffrence, but im in need of some good info and plenty of target practice as iv gone shite at diffrent distances, dont know what its down too, me rushing, getting fed up, my probe seal going lol its giving me a headache

thanks