• Cold Bore Ritual Contest - Only a Few Hours Left To Enter!

    What’s your cold bore ritual, that one thing you always do before your first shot to set yourself up for success? Winner gets new limited edition Hide merch. Remember, subscribers have a better chance of winning!

    Join contest Subscribe

Rifle Scopes Box Testing your Scope

Lowlight

HMFIC of this Shit
Staff member
Moderator
Supporter
Minuteman
  • Apr 12, 2001
    36,392
    44,325
    Base of the Rockies
    www.snipershide.com
    With all the reviews of the various scopes taking place, I thought I would offer up a little advice on the process.

    The biggest problem with conducting a box test is, people generally don't use enough adjustment in order to identify any potential issues with the scope.

    A lot of people will mimic box tests seen in magazines and feel that simply moving the scope to shoot in a square is enough to test tracking as well they usually mention something about the return to zero. This method leads you down a dead end street.

    In order to successfully test you scope you need to move the adjustments at least 24" in limited areas, and even further if youK have the ability to do so. Any errors in tracking will usually only appear when the adjustment range compounds the problem enough to become visible. A 6" or 8" box test is not enough, you should test the tracking across 100% of the max effective range. IE, the dope necessary to reach 1000 yards with a 308 rifle.

    Don't let the gun rags fool you, those box tests conducted on an 8.5" X11" piece of paper are meaningless.

    If your range won't let put a large target board up, at least strive to check the scope to 24". This usually will be enough to identify a problem. As has been stated in some of the excellent reviews done, you don't need to shoot the rifle to test, but that process can be done during things like break in if you are so inclined.

    With a mil based scope, you can first check the reticle spacing then simply read the reticle out without measuring the targets ahead of time. It's good practice to help mil reading and ensures the turrets match the reticle. You can do this with any matching system if you are using something other than mils.

    It's important to take the time and do this right. It builds confidence in your equipment as well it help identify small problems. You can use a level or plumb line and check that the reticle is tracking square and straight, then you can add in windage to bedsore everything works together.

    It's a fun exercise so don't shy away from it.
     
    Re: Box Testing your Scope

    I agree with this. A four inch test tell you if it will track to about 300 yds. And it is a waste of ammo and time.I like to check the return to zero as well from alot of adj. This is a good way to check your scope level as well.
     
    Re: Box Testing your Scope

    Lowlight - someone a couple days ago suggested doing a box test at 25 yds rather than 100 for the two-fold purpose of moving the reticle farther to the extreme of the scope as well as taking shooter error out of the equation. In theory, the angles at that short a range will allow you go to the farther edges of your adjustments while still using a more normal size target.

    What are your thoughts on this technique?
     
    Re: Box Testing your Scope

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: HuntinAZ</div><div class="ubbcode-body">Frank, do you box test every scope you get? Nightforce, S&B, Hensoldt, etc?</div></div>

    It depends on how you look at it, when I zero the scope I am reading the reticle and making the adjustment never coming off the rifle. If I read that I need a 2.3 mil adjustment for my zero and it hits center, then I don't go much further. However if I find I need 2.3 mils and it goes 2 mils and I need to add another .3, which turns into a .5, then yes I absolute run the complete test. Also, I know where my dope should fall and if i find I need 19MOA for a 600 yard target, which I have seen people use, then I know there is an issue as I should be closer to 16MOA. Things like this have helped identify issues for me in the past which leads me to this test.

    Sticking with better scopes, especially ones that I know shine in the consistency department I find things move along much smoother. However there have been plenty of times, due to constantly swapping scopes and rifles, or adding and removing suppressors that I notice something uncommon and the first thing I will do is check the scope with a 10 mil test. Most of the time it is not the scope, however there have been times with various other brands that it definitely was, not necessarily the 3 you mentioned.
     
    Re: Box Testing your Scope

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ReaperDriver</div><div class="ubbcode-body">Lowlight - someone a couple days ago suggested doing a box test at 25 yds rather than 100 for the two-fold purpose of moving the reticle farther to the extreme of the scope as well as taking shooter error out of the equation. In theory, the angles at that short a range will allow you go to the farther edges of your adjustments while still using a more normal size target.

    What are your thoughts on this technique?
    </div></div>

    If you want to do all the math for this, and it works for you, go ahead, I personally think it is better practice to use it like you would, so that means groups at 100 yards. If you feel there is too much of you in there, try bagging it and using the non-shooting method that can be found in Lindy's link. Confirming and working at 100 yards is easier on the brain.

    As well if you feel you're not up to the shooting standard you can use the collimator. But really if you need the practice because you're skills are lacking, then why practice at 25 yards when you should be practicing at 100 yards.

    There is always more than one way to skin a cat, but why work harder when there are smarter and easier ways of doing it. 25 is a pain in the ass.
     
    Re: Box Testing your Scope

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lowlight</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ReaperDriver</div><div class="ubbcode-body">Lowlight - someone a couple days ago suggested doing a box test at 25 yds rather than 100 for the two-fold purpose of moving the reticle farther to the extreme of the scope as well as taking shooter error out of the equation. In theory, the angles at that short a range will allow you go to the farther edges of your adjustments while still using a more normal size target.

    What are your thoughts on this technique?
    </div></div>

    If you want to do all the math for this, and it works for you, go ahead, I personally think it is better practice to use it like you would, so that means groups at 100 yards. If you feel there is too much of you in there, try bagging it and using the non-shooting method that can be found in Lindy's link. Confirming and working at 100 yards is easier on the brain.

    As well if you feel you're not up to the shooting standard you can use the collimator. But really if you need the practice because you're skills are lacking, then why practice at 25 yards when you should be practicing at 100 yards.

    There is always more than one way to skin a cat, but why work harder when there are smarter and easier ways of doing it. 25 is a pain in the ass. </div></div>

    I'm not an advocate for or against this method - just asking the viability. Perhaps you misunderstood the question as I'm not sure what math is involved. I'm NOT talking about doing the reticle measurements or the reticle tracking to confirm if its straight at 25m or yds - I was simply talking about shooting the box after all the other non-shooting tests are done. Unless I'm missing something - isn't the entire point of shooting the box with a LARGE target at 100m to test out the outer limits of the reticle with at least the amount of mils that would be expected to be used at 1000m? So as long as I can move the reticle 10-12 mils and keep it on paper at 25m and shoot the box, wouldn't that be the same (angular-wise) as doing the same 10-12mils but requiring a HUGE piece of cardboard?
     
    Re: Box Testing your Scope

    10 mils at 100 yards is 36 inches.

    It's not hard to find cardboard that large.

    But you can do that optically - without shooting - as I noted in my link. A 4 foot carpenters ruler at 100 yards will tell you everything you need to know.
     
    Re: Box Testing your Scope

    Lindy, using your link, there a recommendation to...

    <span style="font-style: italic">"place 1 inch Shoot'N'C dots every inch, carefully, and accurately, on the stick"</span>

    My question is...if you place 1 inch dots every inch, would they not create just one big black line?
     
    Re: Box Testing your Scope

    I also like to utilize Lowlight's method of placing dots randomly on a larger targetpaper and using just one as an aiming point, reading the adjustment to the other dots in the reticle and adjusting the scope to hit them (all while using the same aiming point).

    The confidence in your equipment you get by checking it is invaluable, not to mention the hours of strife and money saved.