Rifle Scopes Metric adjustments

[ltpurcy]

Hi guys just recently came across this now i am British so metric is what we generally use, i gather British snipers do the same,
considering i am all new to this, would it be easier to get a metric adjustment, just to break it down for you.


Metric is what i generally use cm, meters etc
Now i am new to all scope adjustments and how it works and i am currently looking for a guide, anyone want to point me towards one.

What i came across was the falcon menace 4x14 FFP and i has MOA skeleton mil dot etc

but then metric EMD - What is this
and metric ML 16 - Again what is this

So sorry for this guys, anyone up to the challenge to answer ALL of above?

or at least link me to guides doing the same.

Thanks again guys, gods of the LR world

 

[treebasher]

Re: Metric adjustments

http://www.falconoptics.com/menace4-14x44FFP.php

 

[gugubica]

Re: Metric adjustments

Scope adjustments are not really metric. They are angular systems.

That being said, a miliradian system (commonly refered to as mils) works very well with users that are familiar with metric measurments.

To get a good grasp on how the systems work, start with the FAQs link in my sig line and http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=378812#Post378812. You can also check out www.mildot.com and when you really want to know how this stuff works, hit Lindy's website...He is the master of optical measurement and adjustment... http://www.arcanamavens.com

 

[Lindy]

Re: Metric adjustments

As gugubica notes, scopes adjust by changing the angle between the line of sight of the scope, and the line of the bore.

Milliradians and MOA are measurements of angle.

They don't have anything to do with linear measurements.

With either system of angular measurement, you can use any system of linear measurement, i.e., with either you can measure distances to targets in yards, meters, or any other system which is handy.

 

[ltpurcy]

Re: Metric adjustments

Thanks a lot guys helped a bunch, currently reading through the optics FAQ

 

[TiroFijo]

Re: Metric adjustments

Mil based reticle + clicks is a natural for us metric users because the metric system is decimal and very easy and fast to use with it. MOA in reticle or clicks just make life complicated.

reticle is divided in miliradians:
1 mil = 0.1 m (10 cm) at 100 m

clicks in 0.1 mils:
0.1 mil = 0.01 m (1 cm) at 100 m

Measure object size and distances in meters:

(object size(m)/mil reading) * 1000 = range (m)

Use a table with mil values for elevation and windage corrections, and holdoffs for moving objects, etc.

Corrections based on bullet impact are fast. If you see your bullet impact is about 0.3 mils low on your scope reticle, just dial 3 clicks up and fire.

 

[Lindy]

Re: Metric adjustments

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">If you see your bullet impact is about 0.3 mils low on your scope reticle, just dial 3 clicks up and fire.</div></div>

Of course, they're just as fast on any scope where the reticle graduations matches the adjustment, whether that system be mil, MOA, or IPHY.

If you're interested in speed, though, you don't dial the adjustment - you hold it.

 

[azimutha]

Re: Metric adjustments

The reticle to turret match is more important than which angular system is used. I do prefer mils since they are decimal so some calculations are easier to do, but unless it's by a whole number, e.g. 2 mils, I have a hard time dividing the something like 500 by 1.7 in my head. I still need some device to do that. Generally speaking, I would go mil/mil on your scope.

 

[ltpurcy]

Re: Metric adjustments

Thanks a lot guys massive help

so on the selection screen ill link you to now i want the mil dots

http://www.opticswarehouse.co.uk/proddetail.asp?prod=falcon_menace_414x44ffp

the selection is

MOA enhanced long range mil dot
MOA ML16 Skeleton
METRIC EMD
METRIC ML16

what do i choose

 

[gugubica]

Re: Metric adjustments

Reticle choice is a very personal thing. Some guys like reticles with lots of stadia or reference markers, some prefer very simple ones that do not distract them.

Your usage and personal preference will largely determine which you prefer. I recommend to new shooters to get the more simplified versions as to not overwhelm them. As they progess, they may find the they would like more precision. They can then take that into account the next time.

Either way I would push you towards the mil options with mil knobs. Either system will work, but mils is more of a standard. People without experience with one or the other might as well learn mils instead of having to learn another system later.

 

[TiroFijo]

Re: Metric adjustments

METRIC EMD
or
METRIC ML16 (I like this better)

choose a FFP (first focal planes) reticle, the angle subtension is constant at any magnification


Any metric user that chooses a scope with a MOA reticle is very ill advised.

Do you want to look at your reticle knowing that the line spacing correlates exactly with 10 cm at 100 m (20 cm at 200, 30 at 300, and so on...); that each click = 1 cm at 100 m and there are 5 (.5 mil hash) or 10 clicks (1 mil hash) for each line you see in the reticle

where range estimation is simple and fast:

(object size(m)/mil reading) * 1000 = range (m)

or:

You want a reticle where the lines subtend 2 MOA = 5.82 cm at 100 m, and the clicks are fractional (not decimal), 1/4 MOA = 0.73 cm at 100 m?

and where range estimation is like this??????

(object size(inches)/MOA reading) * 95.5 = range (yds)

(object size(inches)/MOA reading) * 104.4 = range (m)

or even worse, if possible don't mix mil reticle + MOA clicks...