MRAD reticle yardage measuring: tips & experience

[need4sneed]

I’m looking to practice using my reticle to range deer while I can verify with a working rangefinder.

My thought is to keep a card (like dope) with:
“500/Mrad = yards” but also a listed chart of solved equations for yard increments 0-600.
Obviously a big part of this is to pattern in some memorization.

BUT, any considerations to: belly to back variations (specifically, does and young deer to mature bucks)
Is there a known range point where reticle accuracy is completely compromised (on a 14x or 18x zoom max)?
Any other tips or experience to speak to?

Yes I had a rangefinder go down on me and yes I am very salty about it. Looking to add a parachute ranging plan to my skill set.

 

[SnakeEater]

The mil relation formula is below, you’ll need the average size of a deer say from top of back to belly then multiply that by the constant (27.77) then divide by mils. It works best when using a reticle that has the mils broken down to 1/10ths somewhere on the reticle and always estimate to two decimal places (ie: 1.25) for best accuracy. I posted a pic of the tremor 5 reticle as an example of the 1/10th section.

You could do the math prior to give you the mil sizes for a dope card.

Yards
size of target in inches * 27.77 / size of object in mils = range in yards

 

[nm.otter]

I'm thinking the box on the THLR reticle will prove useful here.

 

[elsb0048]

Seems like this is relevant.
not sure if he gave more detail on how he did the maths in the rest of the thread but could be worth a look-see.

Nothing digital.

View attachment 580078

 

[alexnelon]

If it’s smaller than 2 mils you’ll probably measure wrong enough to miss.

Wobble zone plus size variance and angle of observation are plenty enough variables to make it generally a bad idea to try to mil-range past ~300 yards.

 

[need4sneed]

Seems like this is relevant.
not sure if he gave more detail on how he did the maths in the rest of the thread but could be worth a look-see.

Very helpful, thank you!

 

[need4sneed]

If it’s smaller than 2 mils you’ll probably measure wrong enough to miss.

Wobble zone plus size variance and angle of observation are plenty enough variables to make it generally a bad idea to try to mil-range past ~300 yards.

Makes sense, and would agree having never practiced it. Even at a glance of what this is in application, 400 yards seems like the upper threshold of what’s possible in accurate ranging as far as shooting goes, (all variables controlled).
Routing a stalk with known ranges also has its benefits. I’ve certainly been guilty of thinking: “that deer is about 400 yards” - to pull up the range finder and get 280.
I’ll practice it either way.
I guess I am looking for upper limit opinions just like this and also short-hand ways to accommodate variance in deer chest size from an 18” standard - or if that’s even worth considering.