What's this reticle called, and how's it work?

[Lucky]

I've heard it referred to as a 'range-finding' reticle, but I don't know how it would work.
http://www.hkseller.co.uk/Rifle%20Scope/q013.jpg
And are those lines mil-dots, or just some random Tasco design?


Is the funnel used to measure width? Is it therefore calibrated to something already, like a person, or is it for you to set as you like? "Ah, at 75 meters a deer fits this wide."

More importantly, I suppose, is to ask if those curves are right, if that's the proper scale for things to diminish in distance! Or if that depends on what distance you start measuring at?


I guess another use would be that you could replicate the Horus Vision reticle, but in a cruder manner?
http://www.rifleshootermag.com/featured_rifles/RStactical_010506G.jpg

[robsc]

It is a scope/reticle for a crossbow. I don`t know how it works. Google is your friend-----crossbow reticles.

[Jeff White]

You'll have to find the instructions to see exactly what the lines are calibrated for. Basically it works like this: You place the object you want to range in the stadia lines (the curved ones below the crosshair). The range is read by what part of the stadia it fills. This works best on objects you know the general size of. For instance an adult human torso is approximately 19 inches wide from the front or rear. I've seen charts that give you average sizes for game animals.

A bit of trivia, the M72 LAW uses a stadia type reticule like that.

The marks in the cross hair part are not mildots. I'm sure they also measure a particular distance.

HTH
Jeff

[jfruser]

You can learn how to use such an arrangement by searching out old-school artillery texts & such that utilize the stadia technique for rangefinding.

I once helped a guy code up such a method into Visual Basic for a product he was trying to get off the ground.

[Lucky]

Thanks, I've been making some headway.

http://www.globalsecurity.org/military/library/policy/army/fm/3-23-25/image409.gif
http://www.globalsecurity.org/military/library/policy/army/fm/3-23-25/image408.gif


A real crossbow ballistic plexhttp://www.huntersfriend.com/crossbows/reticle-opticalmulti.jpg

The reticle I found: http://www.deben.com/images/optics/riflescopes/crossbow_reticle.gif And the people at Deben didn't know how it worked either! And though the scope is supposed to be Tasco, they'd never heard of it. I didn't pay a lot for it, about $50, but honestly who would counterfeit a Tasco?

Apparently a company called Nantong (http://www.zoscn.com/new/liebiao.asp?str=Red%20Dot) makes pretty much all the low-end scopes on the market, and then various distributors stamp their label on the sides. I've asked but not yet received a reply on how this works - if it works.

http://www.zoscn.com/new/enzhanshi/Pic/reticle2.jpg


I just got it for fun, but now I'm sort of on a mission to make it work somehow. I'm thinking that I'll have to use a football field or the track nearby to try and calibrate it with certain sizes at certain distances, and see if I can't come up with a system.

[Lucky]

I'm starting to get it, but it concerns me that you can use half the funnel or the whole thing. I'm thinking there's not a lot of objects out there that are 2units by 1 unit in their dimensions, besides MBTs and Jeep TJ/Wranglers. So I'm trying to work it so that the calibration is in feet at one magnification, and meters at another. I'll make this puppy work one way or another.

http://www.globalsecurity.org/military/library/policy/army/fm/23-11/Ch5.htm#top

These lines are developed from the mil relation formula and are designed to enable the gunner to estimate range to targets having a 10- or 20-foot dimension.
http://www.globalsecurity.org/military/library/policy/army/fm/23-11/fig38.gif
http://www.globalsecurity.org/military/library/policy/army/fm/23-11/fig39.gif

[Avenger29]

That pic is one of those cheap scopes. Last time I saw one was at a tool show. I considered getting one, but did not know how well it would hold up. About $35 dollars down here. I think the lines are there for show.

A bit of trivia, the M72 LAW uses a stadia type reticule like that.

And I think the Army manual says not to use part of the reticle because it is inaccurate.

[PJ11B4VF7]

That actually looks like a Horus Vision reticle, and they're anything but cheap scopes

[Avenger29]

That actually looks like a Horus Vision reticle, and they're anything but cheap scopes

Then the Chinese ripped off that pattern, and it is from a cheap scope. Believe me, I've seen them. Then again, if the scope can hold zero, it won't be to bad, as the illumination on the one I saw wasn't too bad for a $35 scope.

[Lucky]

I read enough to know that you need good glass, with a lifetime warranty, and it'll cost likely $2k. So I got a Tasco to tide me over. And knowing about Tascos, I got an even better price than you mentioned, because I got them to throw in a second, as well as (cheap) aluminum rings:) I disagree with the reticle illumination though, the manufacturers sure don't know the meaning of 'subtle', the lowest setting has wash coming off the scope walls (as the picture shows).

If they're still around, or something similar is manufactured, this is the stuff: link1 (http://www.csgunworks.com/additem.cfm?ItemID=3161) link2 (http://www.csgunworks.com/product_frames/view_products.cfm?maincat=OpticsProducts&ProdCat=scopes/sights&mfgsort=US%20Optics&showpics=true)

[Avenger29]

Well, the reticle illumination on the one that I saw wasn't too bad. But most of the cheap scopes with illuminated reticles are done very poorly.

But if it holds you over, it holds you over. Next step is something like a nice Leupold. Then you can start looking at the US Optics and stuff. But as Zak Smith says, a nice scope is a one time purchase cost. The other gear, like ammunition, rifle barrells, etc. will far exceed the cost of the scope if you are a serious competitor.