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Fieldcraft ranging with an MOA reticle

Re: ranging with an MOA reticle

Well, first you need to find out if the MDMOA reticle is true MOA, or whether it's IPHY (one inch per hundred yards). Craig?

Then use the correct formula from this page, depending on what the target dimensions are measured in, and whether you want the range in yards or meters:

Ranging Formulas
 
Re: ranging with an MOA reticle

Both of my MDMOA Reticals are IPHY,... knobs are as well,... best system I've ever used.

Target in inchs / retical subtenion X 100 = yardage
 
Re: ranging with an MOA reticle

Sorry for a dumb question, but how do you know if your reticle and knobs are MOA or IPHY? I have a NF NXS scope with NP-R1 reticle and matching knobs.

Thank you very much,

Dyl..
 
Re: ranging with an MOA reticle

Known MOA of object / MOA in reticle x 100 = dist

36 MOA human (from belt to dome) /6 MOA in reticle x100= 600 yard

8 MOA bunny / 4 MOA x 100 = 200 yds

30 MOA stop sign / 4 MOA x 100 = 750 yds
 
Re: ranging with an MOA reticle

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JCH</div><div class="ubbcode-body">on the knob it will say R .25 moa....or .25"

i would guess that your NF is moa/moa </div></div>

I've had knobs that said one thing, but were infact something else. One needs to check everything no matter the Mfg. To include trueness of the retical, knobs, an tracking of same. "Just trusting the gear", will bit you.
 
Re: ranging with an MOA reticle

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: shaggyback</div><div class="ubbcode-body">Known MOA of object / MOA in reticle x 100 = dist

36 MOA human (from belt to dome) /6 MOA in reticle x100= 600 yard

8 MOA bunny / 4 MOA x 100 = 200 yds

30 MOA stop sign / 4 MOA x 100 = 750 yds </div></div>

Actually for MOA the multiplier is 95.5, IPHY is 100.

THE MDMOA reticle is actually in IPHY

Cheers,

Doc
 
Re: ranging with an MOA reticle

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: doc76251</div><div class="ubbcode-body">Actually</div></div>

Very true. I shouldve prefaced that. If you're actually gonna take a shot on that 575/600 scenario, you're gonna take your time (permitting) and range properly. If you dont have time...100 and a bit of holdover puts you on. Unless the guy happens to be standing by something that has a standardized size, it'll all be a bit of guess work anyway. Is he 5'9" or 6'? Slouching? Wearing tall heeled boots? A hat? It'll affect your ranging. (I just thought of something...I wanna range a midget in a cowboy hat.) I digress.

When hitting Minute of Suspect at the closer ranges that LE typically engages, the bullet drop is different, but not game changingly so. The difference between 48/50, 96/100, 143/150 191/200, etc yards isnt a deal breaker. The difference becomes more apparent the further out you get, and that needs to be taken into consideration.

Now, if your goal is to shoot targets on a range in some competition, its up to you. Youve got an exposed silouette target at UKD for a 15 second exposure. 5 shots needed. He comes up. You get him at X MOA in your scope's reticle. You've now got <span style="font-weight: bold">12 </span> seconds. You gonna multiply by 100 or 95.9? Multiply by 95.9, and your friggin target is gone by the time the math is done.

On the other hand, if you wanna punch tiny groups in a target on a fixed range, well, then youve got more than enough time to use your LRF, then dontcha? Hell, if youre shooting for bullseye, dont you generally know the range anyway?

I over simplified it, yes. But for good reason - its fast, accurate enough for most scenarios, and if the most youre doing is ringing steel, it works for most people. You just need to go into it with the knowledge that, the further out this goes, the less accurate it is, and that needs to be taken into consideration.
 
Re: ranging with an MOA reticle

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: shaggyback</div><div class="ubbcode-body">Known MOA of object / MOA in reticle x 100 = dist

36 MOA human (from belt to dome) /6 MOA in reticle x100= 600 yard

8 MOA bunny / 4 MOA x 100 = 200 yds

30 MOA stop sign / 4 MOA x 100 = 750 yds </div></div>


I think what you mean to be telling us here is

Known size in inches of object...

36" human...
8" bunny...
30" stop sign...
 
Re: ranging with an MOA reticle

lol MM. Between posting with whiskey and posting at 4am, Im putting some thoughts together that makes less sense than usual.
laugh.gif


Yes, thats what I was trying to get at
 
Re: ranging with an MOA reticle

I believe the NPR1 reticle is true MOA.

In any case, here the trick for using a Mildot Master with an IPHY reticle.

You'll need a fine-point Sharpie and a sharp awl or ice-pick for this trick.

On the Bullet Drop slide, line up 40 inches on the slide with 4.0 MOA to its left. Notice that Target Range reads about 955 yards. No problem.

Now, take the ice pick or awl, and make a <span style="font-style: italic">small</span> horizontal scratch on the body of the Mildot Master, just above the Target Range Mark, right next to the 1000 yard mark on the slide. Then take the fine-point Sharpie, and blacken the scratch.

This is now your target range arrow for use with IPHY reticles and targets measured in inches. That works because the image of a 40 inch target which is 1000 yards away will measure 4 IPHY. Cool trick - which I learned from Doc76251. Thanks, Doc.

And, if you have a scope with a Horus H25 reticle, you can use that trick with the IPHY ranging reticle on the left side of the tube.
 
Re: ranging with an MOA reticle

Lindy. I'm new at this but my MM shows that 40" lined up with 4 MOA reads 875 yards +/-. 45" might be closer to your figure.

It's late and I've had two drinks so I could be reading your post wrong too.