Rifle Scopes Help me understand

desertrat1979

Private
Full Member
Minuteman
Feb 20, 2006
30
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Southern NV
Ok, on a previous post I provided what I thought was correct info, however as it turns out I was completely wrong. Its regarding mil/mil scopes. Currently I have a mildot scope with 1/4 moa adjustments so that is what I am use to.
I did do a search, used the google search, SH, and read the FAQ section. I found some info but nothing to answer my questions.
Now here is what I know. If I make one adjustment on my scope (1/4MOA), then I have moved the reticle 1/4 moa at 100 yards from its previous position. Now, this translates in an angular fashion of 1/4 @ 100, 1/2 @ 200.....2-1/2@1000. That is just from one adjustment of the scope.
So, bring a mil/mil scope into the picture. 1/10 mil adjustments. So, when a singe adjustment is made, the reticle has moved 1/10 (.36") @100. Would that not translate to 1 mil@ 1000 yards (3.6")?
So, in zeroing the rifle at 100, if the bullet impacts exactly 2 mils low, then would 20 adjustments of the elevation knob be necessary to make the POA and POI match? The confusing part to me was, and this is how I understood it, was if it were 2 mils off at 1000 yards I would still need to make 20 adjustments on the scope. Because a mil is a mil is a mil.(A great statement for those who already understand it.) But wouldnt 20 adjustments move the reticle 20 mils (720 inches)???
I understand that 1 mil off is 1 mil off, but the adjustments made on the scope would vary based on target distance.
And yes I know counting clicks or adjustments is a recipe for disaster, so for the sake of argument, the scope will adjust 10 mils per revolution, turret numbered 1-10 with 9 1/10 hash marks between each number.
This really cant be as hard as it was made out to be, or I am just that dumb.
 
Re: Help me understand

yeah like wil said, your math is a little off. 1/10th mil at 1000yds is 3.6 inches. One mil would move you .36 @ 100, .72ish @ 200 and so on. 1/10th mil is always 1/10th mil. No 20 adjustments at 1K would not move it 20 mils, it would move it 2 mils. A mil is a mil is a mil is a mil. This holds true no matter what, if you shoot at 1K and see that you are 1 mil low then you need to adjust 1 mil down, roughly 36 inches high above the target. You seem to be over complicating the math. If you shoot see the splash or impact read the reticle and make that adjustment
 
Re: Help me understand

At my elevation (5200) with a 175 grain SMK it will take around 8.2 mils to reach 1000 yards.

20 adjustments on a 1/10 mil scope would only be 2 mils, not 20 mils. Remember they are 1/10 mil adjustments.

you are making it harder by trying to mix the inches with mils. Forget inches and MOA when using a mrad based scope. I learned on an MOA scope as well and still sometimes do what you are doing.

Sometimes it is easier to think in meters as well. 1/10 mil is one cm at 100 meters. If you want to compare it to MOAs 1/10 mil is about 1/3 MOA.
 
Re: Help me understand

1/4MOA @ 100 yds = 1/4 MOA @ 1000 yds.
.1 mil @ 100 yds = .1 mil @ 1000 yds.

1/4 moa = .262" @ 100 yds, .523" @ 200 yds., 2.62" @ 1000 yds.
.1 mil = .36" @ 100 yds., .72" @ 200 yds., 3.6" @ 1000 yds.

They're both angular measurements (think wedge) with inch equivalents at different distances (distance across the wedge).

Clear as mud?

John

looks like I'm a slow typer too.
grin.gif
 
Re: Help me understand

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: prplhaz72</div><div class="ubbcode-body">At my elevation (5200) with a 175 grain SMK it will take around 8.2 mils to reach 1000 yards. </div></div>

So you are making 8.2 mils of adjustment on the scope to compensate for 820cm of bullet drop @ 1k, am i right?
 
Re: Help me understand

Yes but that is 1000 yards not 1k. At 1k it would take more like 9.4 mils. That is the problem with mixing systems, its gets things all screwed up.
 
Re: Help me understand

yeah simplicity is key here, just remember believe the bullet. If it impacts 1 mil low in your reticle throw 1 mil on the turret or hold 1 mil higher. Dont overthink it. and remember a mil is a mil is a mil
 
Re: Help me understand

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body">prplhaz,

1K-1000 units

1K doesn't signify 1000 meters, that's 1km.

most folks say 1K and mean 1000yds

</div></div>
Thats what I was getting at.