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Old 06-03-2019, 10:11 PM
PowderDreams PowderDreams is offline
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I have read several articles regarding scope set-up that refer to counting the number of clicks and then setting your vertical adjustment at the midway point (100 clicks set at 50 for sight in). I am having difficulty understanding the logic in this configuration. It seems to me you would be better off setting the sight in much closer to the bottom (say 10 clicks), thus having more elevation adjustment for long range (800 yards and beyond) distances.
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Old 06-03-2019, 11:13 PM
rswink rswink is offline
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Play that idea in BDC

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Old 06-04-2019, 12:27 PM
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The purpose for centering the adjustments is it places the reticle in the optical center of the lens where there is theoretically the most clarity and least parallax, and it also gives you the maximum amount of leeway in all directions.

If you need longer range, it's better to use angled mounts instead of getting the turret adjustments too far off center.

Most modern scopes have more than enough range for what the majority of shooters will need.
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Old 06-04-2019, 02:18 PM
PowderDreams PowderDreams is offline
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rswink - Please educate me: What is BDC (other than Bottom Dead Center)?
Snypr708 - That sounds reasonable. Thank you
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Old 06-04-2019, 03:49 PM
rswink rswink is offline
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Bullet Drop Calculators

I was super tired and was a little short winded there, sorry.

Basically if you start plugging in the numbers you very quickly realize that your clicks are needed elsewhere, get a MOA rail to get where you want to be so you can move closer if you need to.

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Old 06-04-2019, 04:52 PM
xBOOMSTICKx xBOOMSTICKx is offline
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Might sound silly but I just look down the barrel. I prop the rifle on sandbags/rifle rest so it can not move, and look thru the barrel down at my silhouette set up at 100yrds. Adjust scope until the two match. It's usually not very far off.ymmv

Edit; sorry, just realized this is not a real answer to what was asked, but others have it covered.
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Old 06-04-2019, 08:34 PM
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Originally Posted by PowderDreams View Post
I have read several articles regarding scope set-up that refer to counting the number of clicks and then setting your vertical adjustment at the midway point (100 clicks set at 50 for sight in). I am having difficulty understanding the logic in this configuration. It seems to me you would be better off setting the sight in much closer to the bottom (say 10 clicks), thus having more elevation adjustment for long range (800 yards and beyond) distances.
Once you attach a scope to the rifle (assuming it done correctly) the point of aim at a fixed distance is what it is with respect to the zeroed reticle center mark. You are adjusting the angle of the barrel up or down by adjusting the elevation turrets up or down (while keeping the point of aim at the intended target as target distance increases or decreases).

To do what you want to do would require a base (20MOA as example) that is angled down there by forcing the elevation adjustments to be lower than they would be with a level zero.

This is for a AR railed platform, as one such example.

https://www.milehighshooting.com/spu...-20-6moa-1-50/


The same effect can be accomplished with one of the many BDC recitals that are available.


I’ve really tried to keep this simple. There are many great videos on this subject that will have graphics they may make more sense to you.
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Old 06-05-2019, 08:33 AM
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Quote:
Originally Posted by PowderDreams View Post
I have read several articles regarding scope set-up that refer to counting the number of clicks and then setting your vertical adjustment at the midway point (100 clicks set at 50 for sight in). I am having difficulty understanding the logic in this configuration. It seems to me you would be better off setting the sight in much closer to the bottom (say 10 clicks), thus having more elevation adjustment for long range (800 yards and beyond) distances.
I'm not sure I understand exactly what you're asking

You can only set the scope to the POI at a given range

Initially, the bore axis has to meet the line of sight, then adjusted to bullet drop and point of impact (POI)

Generally you want your scope or sight as close to the bore axis as possible

In the above post 0002S points out that because of the carry handle being 2.6 inches higher than the bore axis, it may need to be angled or shimmed downward for very short ranged targeting

The opposite is true for very long range targeting, the scope may need to be angled upwards in order to compensate for the longer range

I presume what your talking about in the intial set up is that if you have a 100 clicks in total movement in your scope, you'd want a mount that would be centered at 50 clicks to give you equal amount of both upward and downward travel to compensate for ranging in order for your reticle to match POI at both a shorter and longer range

Help us out with more info as to what you're trying to accomplish?
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Old 06-05-2019, 08:36 PM
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Israel Putnam Israel Putnam is offline
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Originally Posted by ManyFeathers View Post
I'm not sure I understand exactly what you're asking

You can only set the scope to the POI at a given range

Initially, the bore axis has to meet the line of sight, then adjusted to bullet drop and point of impact (POI)

Generally you want your scope or sight as close to the bore axis as possible

In the above post 0002S points out that because of the carry handle being 2.6 inches higher than the bore axis, it may need to be angled or shimmed downward for very short ranged targeting

The opposite is true for very long range targeting, the scope may need to be angled upwards in order to compensate for the longer range

I presume what your talking about in the intial set up is that if you have a 100 clicks in total movement in your scope, you'd want a mount that would be centered at 50 clicks to give you equal amount of both upward and downward travel to compensate for ranging in order for your reticle to match POI at both a shorter and longer range

Help us out with more info as to what you're trying to accomplish?
A 20 MOA base angles the scope downward.
This “raises” the bore.
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Old 06-05-2019, 08:56 PM
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Originally Posted by Israel Putnam View Post
A 20 MOA base angles the scope downward.
This “raises” the bore.
^^^^^THIS^^^^^
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Old 06-06-2019, 07:10 AM
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Quote:
Originally Posted by Israel Putnam View Post
A 20 MOA base angles the scope downward.
This “raises” the bore.
That's great information

But I already know this....
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Old 06-06-2019, 07:26 AM
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Originally Posted by ManyFeathers View Post
That's great information

But I already know this....
Then why did you say this:
“The opposite is true for very long range targeting, the scope may need to be angled upwards in order to compensate for the longer range”



I was simply clarifying your “mistake”...
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Old 06-06-2019, 07:34 AM
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Oh I see it now

Obviously my head was in my ass yesterday
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