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Adjusting a mil scope

A millradian is an angular unit of measure, while inches are a linear unit. If the spotter is giving you information in inches, you need to convert inches to millradians to adjust the angle of your rifle barrel.

1 mil at 100 yards is 3.6"
1 mil at 500 yards is 18", or each click on your 0.1 mil/click scope knob is 1.8"

Notice how the angle is the same but the distance has changed.
 
SecondsCount said:
A millradian is an angular unit of measure, while inches are a linear unit. If the spotter is giving you information in inches, you need to convert inches to millradians to adjust the angle of your rifle barrel.

1 mil at 100 yards is 3.6"
1 mil at 500 yards is 18", or each click on your 0.1 mil/click scope knob is 1.8"

Notice how the angle is the same but the distance has changed.
Click to expand...


So you are spotting for a guy shooting at a 10" plate at 1000 yards his bullet strikes the dirt
9 rocks and and 12 pebbles to the right of the target, how many inches should you tell the shooter to correct.
 
DLT said:
Haha yea. I’ll get it. I just ordered it today hopefully it will ship out soon and I can get a lil practice in before the crow shoot on Jan 20th if I decide to use that rifle.
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Really nothing to get. Use the reticle as a ruler and tell you how many mils you need to adjust. 3 mils right? Dial 3 mils left. Not 30 clicks as counting clicks is a sure way to get lost and the scope makers put those big numbers on the turrets for a reason. ;)

Inches are a useless thing to think about so ignore them. Your scope is in mils so use mils. When you do you will see the ease of it.

What scope did you buy?
 
Eagle Six said:
May I ask @DLT what scope are you getting, well I guess so I just did!!!
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Haha yea it’s an Arken Epl4 4-16. I can’t find any bad talk / reviews on those models. I have been holding off for some time to buy an Arken scope, mostly because the ep and sh models are so dang big and heavy. I figure it’s best to try a mil scope costing $330 than one that costs $800 and not like it lol
 
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DLT said:
I’m going to try a mil scope for the first time. I know it’s going to take a little time to get used to it but I do have 1 question right off the bat. Say I shoot at for instance 500 yards and I impact off the paper to the right 3 mils but I want to dial my scope instead of holding 3 mils how does that math play out ? If it’s a ignorant question please forgive me
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Maybe, maybe not. Don't make it more than it is.

I've literally gone between rifles with MOA and MIL turrets on the same day, with no particular issue.

If your life depended on quickly ranging and engaging targets on a two-way range that are trying to do the same to you.... then you might worry.

As it is... meh.
 
Eagle Six said:
Well that's kind of down and dirty.....Steve. However, if he needs 3 mils at 500 yards, his POI was off 54" and 54 divided by .36 is 150, or divided by .4 is 135, or divided by .5 is 108. Something else is missing I think.
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Just trying to keep it simple for him. Do you think his spotter can actually determine it was off by exactly 54"?
 
DirtySteve said:
Just trying to keep it simple for him. Do you think his spotter can actually determine it was off by exactly 54"?
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I doubt it, but his spotter may come closer to estimating the miss better than rounding .36 to .5 for a correction, also why my comment way back, "Most likely the spotters call is going to be their estimate based on their ability to estimate!".

Rob01 said:
If my spotter started giving correction in inches I would get a new spotter. Lol
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The OP didn't say his spotter gave him inches, he referred to his spotter giving how much he was off or inches. I think that was in reference to understanding what linear amount a mil would equal at any given
distance. Getting a new spotter may be an option, or it may not. You may have to make do with what you have. If my shooting buddy was a carpenter by trade, I would probably prefer him to call inches until I could train him/her on mils or MOA, unless the target was marked in mils or MOA for his reference.
 
Rob01 said:
The thing is it’s not hard if you forget inches or any linear. As I said use the reticle like a ruler to tell you the correction. It’s that simple. Teach your spotter that too.
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I agree teaching and learning are good. If the spotter has a spotting/scope with a matching reticle he/she can provide the miss call faster with greater accuracy. If not, they need some type of reference which could be angular or linear and which one they can do best.
 
Eagle Six said:
I agree teaching and learning are good. If the spotter has a spotting/scope with a matching reticle he/she can provide the miss call faster with greater accuracy. If not, they need some type of reference which could be angular or linear and which one they can do best.
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I was talking to the OP and not arguing with you. Also joking to Dirty Steve with the inches comment and not anything about the OP.

The spotter can spot through his scope if he needs a reticle but calling in any linear is not the way. Better to use the target dimensions like "half a target right, hold half a target left" instead of any linear.
 
Rob01 said:
I was talking to the OP and not arguing with you. Also joking to Dirty Steve with the inches comment and not anything about the OP.

The spotter can spot through his scope if he needs a reticle but calling in any linear is not the way. Better to use the target dimensions like "half a target right, hold half a target left" instead of any linear.
Click to expand...

No argument on my end just conversation. The OP had mentioned he didn't want to hold, rather dial. I really want to question WHY, but we all have our likes and dislikes and a lot of that I suppose depends on the style of shooting we like. So, if he is going to dial, he still needs to know the size of target and distance to target so he can calculate the turret twist amount. I will assume (I know that is really bad) sooner or later the time it takes him to get the math right, and a lot of trial and error, and often quickly changing wind conditions, the suggestions from you and others will turn on the light bulb that some hold over's/off's are quicker, easier, and more accurate for some styles of shooting.
 
No he can read the reticle like a ruler and then dial that amount. Same as if he was holding. Still no need for inches. Never a need for inches. The wind will change before he starts converting linear to angular.
 
I'm sure he will figure it out to suit him, and will discover it's not that hard. Hopefully he will skip the chapter on determining distance by target size and use a rangefinder.
 
Ranging with a reticle is a dying art and not really needed. He could do it with moa or mils if he wanted too. It might help him learn to break down the reticle but would just be more unneeded confusion at this point for him.
 
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