Converting MOA dope to mils to use hold-hovers ...

[Snakum]

I've never shot long range with anything but a mil/mil scope, but now I have a mil/MOA scope on my semi (1/4 MOA turrets) and I want to get my dope and then use mils for hold-over. I thought it was simple but the conversion I used yesterday had me WAY off. I missed something.

Once I get my dope shot thru in MOA, what's the calculation to convert it to mils? Example ... I have a 13.2" drop at 300 yards, when checking dope I find that I need 4.25 MOA dialed on the scope to be dead on at 300 yards. What is the equation to find the corresponding mils?

 

[BobinNC]

Re: Converting MOA dope to mils to use hold-hovers ...

Divide MOA by 3.43 and you have your Mils

Bob

 

[Snakum]

Re: Converting MOA dope to mils to use hold-hovers ...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BobinNC</div><div class="ubbcode-body">Divide MOA by 3.43 and you have your Mils

Bob</div></div>

Thanks Bob. I did something goofy (moved a decimal). Appreciate it.

One last thing, am I remembering 1/4 MOA adjustments correctly at different yardages?

100 .250
150 .375
200 .500
250 .625
300 .750
350 .875

... and so on?

 

[Rob01]

Re: Converting MOA dope to mils to use hold-hovers ...

There is no need to think in inches. You would be best to forget them all together except for target size when ranging.

Run your charts in MOA for the knobs and Mils for the reticle. When I used to have MOA knobs and mils reticles I would run JBM Ballistics with one column in MOA and one in mils. That way I had the data for both. If you have all your MOA data then just convert it to mils.

 

[Snakum]

Re: Converting MOA dope to mils to use hold-hovers ...

I already have my JBM-generated tables in inches drop, mils, and MOA.

However ... if I send four or five rounds at 300 using my JBM dope, and I find I am still a couple inches low, I'll need to know how many inches the group center will move for each click at the yardage given.

Just found a chart.

 

[Rob01]

Re: Converting MOA dope to mils to use hold-hovers ...

Or you can look through the reticle and knowing that .1 mil is .34 MOA just figure your correction from there. No need for inches. Use the ruler in front of your eyes.

You shouldn't need a chart in inches as your scope doesn't adjust in inches.

 

[Snakum]

Re: Converting MOA dope to mils to use hold-hovers ...

If I could see the POI past 300 yards or so I could do that, definitely. But with the Nikon 2.5 - 10x I can't see the impacts that far out, unfortunately.

I'm still trying to learn/relearn this stuff, and haven't used a mil/moa scope before. Always something new to learn.

 

[sobrbiker883]

Re: Converting MOA dope to mils to use hold-hovers ...

If you are following through on your shots you should be able to see splash with a 10X, distance is your friend actually, as far as time of flight and keeping eyes downrange.

doesn't matter what your knobs say, adjust with the reticle and make a mental note-convert after the follow up shop and write down what you actually needed for that distance under those conditions.

 

[Snakum]

Re: Converting MOA dope to mils to use hold-hovers ...

Oh, I should clarify: I'm shooting paper. I generally don't have anywhere to shoot steel while getting dope, so I have to step off and lase paper at 100 yard increments. If I was on freshly painted steel I could definitely see it. But for now I'm just shooting paper at 100 - 400 or 500. Shoot ... walk down and measure ... walk back and adjust scope, write the dope, etc. Then once the dope is set I might move up 50 yards and shoot again to check the 250, 350, etc yard increments.

 

[sobrbiker883]

Re: Converting MOA dope to mils to use hold-hovers ...

ahhh....

paper, you may not see holes from rounds even with the nicest glass with higher mag depending on conditions.

Plenty of hide vendors sell steel at good prices. One target, lase and shoot, write and move. Rinse and repeat.

 

[Sterling Shooter]

Re: Converting MOA dope to mils to use hold-hovers ...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Snakum</div><div class="ubbcode-body">Oh, I should clarify: I'm shooting paper. I generally don't have anywhere to shoot steel while getting dope, so I have to step off and lase paper at 100 yard increments. If I was on freshly painted steel I could definitely see it. But for now I'm just shooting paper at 100 - 400 or 500. Shoot ... walk down and measure ... walk back and adjust scope, write the dope, etc. Then once the dope is set I might move up 50 yards and shoot again to check the 250, 350, etc yard increments.</div></div>

Incidentally, there are times when you want to do the very simple math to convert MOA to inches, like when favoring with a simple cross-hair reticle. Let's say you've got a target at 600 yards and a wind which requires 6 MOA of favor. Now, you could make a sight adjustment without doing any math; but, for favoring, since your brain appraises linear relationships better than angular relationships, knowing 6 MOA equals about 36 inches at 600 yards will help you know where to place the sight.

Also, walking to the target to see hits, is precluding you from marksmanship progress. You need some means to understand the call/strike corollary.

 

[Rob01]

Re: Converting MOA dope to mils to use hold-hovers ...

Using a MOA or Mil based reticle is easier to use holds and not have to guess in relation to the target how far the distance is for a hold.

Snakum, use shoot n c targets. You can see the impacts easier without having to walk.

 

[Snakum]

Re: Converting MOA dope to mils to use hold-hovers ...

All this is just for zeroing and for getting dope. For competitions or just fun shooting I hold over. It's pretty easy out to 500 yards as long as the dope is good. Especially with half mil hash marks.

 

[11B503d]

Re: Converting MOA dope to mils to use hold-hovers ...

You might try some of the stick on shoot-n-see type targets. Just peel them and place them over the X and 10 ring. I have a couple of sizes that I use when shooting paper at distances past 300m. I can usually make out POI at 600m through the spotting scope provided theres not a very heavy mirage.

(Just noticed Rob said the same the other day)

 

[HillbillyfromAL]

Re: Converting MOA dope to mils to use hold-hovers ...

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Snakum</div><div class="ubbcode-body">If I could see the POI past 300 yards or so I could do that, definitely. But with the Nikon 2.5 - 10x I can't see the impacts that far out, unfortunately.

I'm still trying to learn/relearn this stuff, and haven't used a mil/moa scope before. Always something new to learn.</div></div>

Buy a Spotting Scope. It'll cut way down on your range time walking back and forth. If you ain't got enough for a decent one even a crappy one from wal-mart should let you see a few bullet holes at 300

 

[NOMAD]

Re: Converting MOA dope to mils to use hold-hovers ...

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