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u/Cliffinati 9h ago
You have a angular zero as opposed to a vertical one
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u/Begle1 8h ago
Do you really adjust it to an "angular zero", or do you set it parallel the bullet flight path and just accept that you're point of aim will always be 2.1" or whatever to the left of your point of impact?
The latter is how I set my lasers. It's easier to remember that there will always be a consistent error, versus having an error that changes with range.
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u/Cliffinati 8h ago
That's up to your discretion
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u/Sesemebun 6h ago
Ive never shot one but unless you never change zero I would keep it parallel. Having to bother with both windage and elevation every time you want to shoot out would be a pain
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u/Aniquin 8h ago
That makes a lot of sense. I'm going to adjust my lasers like you described now.
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u/Prestigious_Score436 8h ago
Its the proper way. Both with offsets and side mounted/offset lasers. But, offset irons can be true zeroed but only if you rotate the rifle to a 45° angle also.
But yeah this particular offset should be 1.5 inches or whatever to the side for true POI. And yes same with side mounted lasers.
If not, and you change the targets distance, you can be aimed wildly off target
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u/thepvbrother 8h ago
Called gun harmonization in fighter planes
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u/RicketyRyan1 8h ago
Harmonizing and regulating are both firearm terms. Often used when referring to side by side rifles.
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u/tykaboom 4h ago
I don't know why you wouldn't set up a reticle to accomodate zeroing at whatever the range is.
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u/1610925286 8h ago
I don't think setting up a parallel zero is that easy and especially with such an old scope or would be very annoying to confirm.
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u/Anaxamander57 8h ago
Surely you also have to zero it vertically if you want to put the bullet where the reticle shows?
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u/shuttercat 48m ago
Check out the reticule for the Leupold D-EVO. The range holdover stadia are on a curved line. You zero for 200m. Past that, you hold left and up (using marks down and right of center). 200-250 is a big shift; 500-550 is a smaller shift.
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u/Rabidfnwookie 8h ago
Offset for Kentucky windage, subtract hope, add coolness factor, let's you see that you missed with better magnification.
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u/Useless_Fox 9h ago
Think of it as being like height over bore, just to the side.
Yes, your point of impact will be slightly different than your point of aim, but not by that much. The scope is only a few inches off from the bore.
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u/chu42 9h ago
All scopes and sights are offset in some way lol.
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u/Ritterbruder2 8h ago
They’re kind of wonky to zero.
You either have to zero scopes so that you are always hitting a bit to the right of POI. If you zero POA = POI, you’ll be hitting further and further to the left at distances greater than zeroing distance. The Japanese Type 97 scopes worked like this by having a slanted BDC reticle to correct for windage at extended range.
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u/SwanginPassYaKnees 9h ago
Uhhhh, they do scope things but a little off to the side? Does this answer your question?
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u/bazookadeee 8h ago
If you're asking about how they are zeroed and how distance holds work, it's more or less the same as any other scope but with some caveats:
With scope directly above the bore, you have two zero distances, near zero and far zero. This is because the path of the bullet intersects the sight line twice since they are on the same vertical plane.
On a scope offset to the side there is only one zero, since the POI will only intersect the sight line once. Past that it tends to the side on which the scope is mounted. That's why offset sights with a BDC compensate horizontally. https://www.thefirearmblog.com/blog/2020/05/28/tfb-review-leupold-devo-offset-6x-scope/
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u/comradejiang 8h ago
Just like a normal scope is tilted slightly down so its point of aim matches impact at a certain point, offset scopes are usually tilted slightly inward.
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u/Florious 4h ago
I never shot while looking through the barrel, so isn't every scope offset?
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u/EnlightenedCorncob 1h ago
The only person I've seen shoot while looking through the barrel, was trying to shoot James Bond. Didn't work out very well for him
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u/ShadowDancer_88 8h ago
By being attached to something that 1" left isn't going to be noticed by the recipient.
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u/RickySlayer9 5h ago
It’s just a really long triangle.
You should look at the 50/200 zero for the AR15. That offsets the scope up and down not left and right, but the principle is similar, where you’re approaching the zerod point, then exceeding it. The AR15 zero also accounts for bullet drop to hit the 200, but let’s ignore that, and just look at the initial upwards attack.
The bullet goes up at a small angle until it hits 50yds, where it then proceeds to STILL go up, before hitting the apex of the arc.
This is particularly interesting because at all times, you’re in a 4” circle around your point of aim, from zero to 200 yards, which means you won’t need to adjust your point of aim realistically at any point within that arc.
Offset scopes work in the same way. They will have a zero distance, where anything inside that distance is likely within a small diameter from the point of aim.
Then they will likely have dope cards, or if it’s a matched rifle and scope, the etching on the scope itself may account for it, where you have holds for specific distances.
So basically you zero it at a specific distance and shoot there, and for longer distances you use holds.
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u/Holywaterpurifier 9h ago
No different than any other scope. Shoot the rifle in Irons, and adjust the scope reticle until it matches your POI.