Re: MSR Reticle Questions
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BigJimFish</div><div class="ubbcode-body">It's works a bit different than I thought on originally seeing it. That data sheet was a big eye opener. The layout is somewhat reminiscent of the ps0-1 sniper scope and I thought it was based on average human height. On reading the sheet though I found the dimensions not suited for this. .5 meter lines 1 meter above base lines. The .5 meter line is very good for ranging chest width. As for the 1 meter, they appear to indicate knees to shoulders distance or waist to head. Different than I have seen before. For what it is worth I would rather have had a total height gap with a shoulder width top line. </div></div>
Bit old topic, but..
Seeing total height can be bit challenging. Vegetation often covers feets and legs.
Secondly -not a big problem but still- temperature difference between air and terrain can cause refraction -and mess up dimensions you see thru scope. This effect is usually strongest very close to ground.
Its common to see fe oval shape car tyres -or stretched legs.
Shoulder width works pretty well except it target is moving, sideways, in angle and/or turning constantly -as living creatures tend to do. Using waist/crouch to top of head average dimenson is very useful in this situation -when you need range instantly. Also using 1m reference instead of 0.5m (shoulder) is more accurate, simply because bigger object always decreases measurement error if range is kept same.
But If you still prefer to use total height, you can use same stadia. Just double the range stadia says and use it in 2meter "mode".
Average man height is around 1.85meters (with shoes and rag or helmet). Error is therefore not too big -and you can substract that 10% or so remaining error easily without calculator.
Illuminated 1x1mrad center cross has also "hidden" quick ranging system based on human dimensions, see Norwegian youtube video.