How to Zero a Rifle-Scope
You've just got yourself a new Rifle-Scope, fitted it and let me guess...for some reason your shots are landing nowhere near the crosshairs?
Sadly there's more to rifle scope sharp shooting than just plonking the scope on the rifle and forever after shooting like an SAS sniper! You have to "zero" it.
Think about it. It's like a bike wheel. If you tighten the bolts wrong, too much on one side for example, it spins wrong and rubs the brake pads. It's the same with a Rifle-scope. If it's not set up correctly it will be offline and even at short air rifle, airsoft and paintball ranges this is going to throw your accuracy right off. At longer ranges you'll miss by a mile (well figuratively anyway!)
What Does "Zero a scope" mean?
Zeroing a sight or scope means getting the crosshair in position so that when you shoot. Ground zero if you like. The point of impact.There's a lot of discussion amongst shooters on the best way to zero a rifle-scope or sight. What I've written below is what I've been sending out to my ebay scope buyers for the last year or so and received a lot of good comments back about it so I know it's OK!
How to Zero a Rifle-Scope
First of all you need to set a firm foundation by fitting the scope mounts well.
Put the scope mounts on the rifle first with the top brackets removed.
Tighten them into place using 1/2 turns at the time so that they sit solid and level as best as is possible, i.e., the downward pressure is as equal as possible. At this stage don't tighten them fully as you might want to slide them up and down a little.
Now take rifle-scope and place it on top of the open rifle mounts.
Make sure the windage and elevation turrets are one up and one to the right (these are the "turrets" on the sight. You use them later to make micro adjustments and in the field adjustments for wind)
Then put the top mount brackets on and tighten - Again use partial turns to tighten up.
Don't tighten fully at this stage, you may yet need to adjust a little.
Zero the Rifle-Scope
Lie in your normal shooting position and check that you can see through the scope well...
The distance between your eye and the rear scope lens is called Eye Relief.
Unlike cartoons you do not use a scope by pressing your eye up against the scope lens!
Once comfortable complete the screwing down of all mounts so that your set up is solid -
take care at this stage to keep the final turns partial and one by one to ensure pressure is equal.
Now it's time to zero the rifle-scope for shooting:
Load the rifle
Adopt your standard prone/lie down shooting position.
Prone is the best way as if you test shoot from standing or kneeling positions you waver more and it's harder to do a "true test".
Put some sort of target in place at say 20 yards - or whatever you think your "standard" range will be.
Using cross hair on target centre - Take 2-3 shots - Where do do they fall in relation to where you want them to? Right, left, up, down - dead on (lucky you!)
2-3 shots is best as it will average out shooter inaccuracy and give you a more "significant" feel for how far or close you are from true zero.
Now it's time to use the windage and elevation turrets to get it zeroed dead on. These are the 2 turrets on the top and right side of the scope. See my website for pictures.
Models vary, you'll probably screw a cap off and expose either a coin twist or finger knurled type of dial.
The top turret adjusts up and down. The right one left and right.
If you have your scopes instructions they should have a table with figures to tell you what each click adjustment means in terms of cross hair movement at "x" distance, e.g., 1/8 inch at 100 metres.
Use single click turns and each time take a new shot to gauge where the shot now falls - the dials basically adjust the cross hair position up-down and left-right.
It's trial and error basically but with testing you'll get to where you need to be and be able to trust that your shots will go where it says they will! This may take some time and a lot of shots. Be patient!
I sell rifle-scopes and laser sights on ebay for a living. After getting asked repeatedly for instructions on how to zero scopes I wrote a text file guide to send to people. This had some really good comments back so I decided to use it as the basis for a new website which is about, funnily enough, how to zero rifle-scopes (and zero in laser sights, how to go about choosing a new scope and more) See it at http://www.zeroriflescope.co.uk/ and my ebay shop at http://stores.ebay.co.uk/Hunting-Shooting-Fishing
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