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Please help with rangefinder reticle

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/23/2008 at 08:06
johnjnam View Drop Down
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Hello  all

I am  a newbie  here   and  please allow  me  to  post  my  letter  here .

 

I  do  live  in Namibia  where  info is  on  rather  short  supply .

 Recently I  bought a Bushnell   rifle  scope   through  e-  bay  from the  US  .  It  is a  6-24 x 50  OE scope  and has a red/green illuminated  reticle  as well as a  range  finder  inside  it .

 Problem  is  just  that  I  don’t  know   and  cant  find any  info  on  what  the  lines  of the  range  finder mean .

 I  searched  the  internet  all  over  and  cant  find  any manual  or  instructions .

Strange  enough  the  one  Bushnell dealer refers  me  to  the next  and  nobody  can  give me an  answer .

I have  learned  in  the mean  time  that  it  is a Chinese replica

But  even  so -  I  have  tested  it  and  it  works  fine , hunted  with  it  and  all  shots  go  where  they  were  intended  to  go .

If  somebody  can  just  mail me  some  instructions  regarding  the  range  finder  then  it  would  be  great ..

 I  will  attach a   sketch  of the  range  finder  here .

 Please be  so kind  and  mail me  some  info .

Living  in Africa  it  is not  always  easy  to  get  into  the  internet  and  into  this  site   here  . So  if  I my  ask  

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/23/2008 at 08:47
Dale Clifford View Drop Down
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boy am glad you posted. about a week ago I got this e-mail from a prince in nambia wanting to send a certified check then have me send a certified check to this other bank and keep the difference -- was really suprized to find the first check was forged-- anyway make a long story short-- can you post a picture???
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/23/2008 at 09:31
johnjnam View Drop Down
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Hi Dale
 Thanks  for the  reply .
 I  tried  to attach a  pic  of the  reticle   but  it  failed  so  let  me  try again
 I  am also getting  those  letters  of  people   who  wnat my  banking  details  and  offering me millions  in reward  . Lots  of  scammers  around here .
 Regards
 Harald
Can  you maybe forward me  your  direct e mail  address maybe  that  will be  easier  to attach  the  pic .
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/23/2008 at 10:21
johnjnam View Drop Down
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Hi Dale
 
Im  sorry  but  for  some  reason  I  cant  attach  a  pic here 
 If  you look  at  the  following  web address   it  will show the  type  of  reticle .Thanks  Harald
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/23/2008 at 10:37
supertool73 View Drop Down
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It looks like just a variation of a mil dot type reticle.  To use them to range, they have to be set at a specific power where the distance between the lines is accurate with the dimensions of what you are looking at.  Meaning that on 10x vs. 20x the target will change sizes in the scope but the reticle lines will remain the same size.  So you need to know at what magnification power it works on.  Then you need to know the exact size of your target and plug in some formulas to find the actual range.  It is not like a laser range finder, ranging with a reticle can be difficult to get good readings because you may not know the actual size of the target and without it you will be off.   Hope that makes sense, kind of hard to explain. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: April/23/2008 at 10:40
supertool73 View Drop Down
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Here is a really good paper that one of the forum members wrote that will help explain how mil dot reticles work and how to apply the math to find distances.
http://files.thetallengineer.com/RangeEstimation_Rev1.pdf
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/05/2008 at 19:09
Kickboxer View Drop Down
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That reticle is the one used in the MUCH loved NcStar riflescope. I have one I use for trying things out. Not bad, really, just kind of "grainy", "cloudy" optics at longer ranges. Has done OK for me, but I won't ever buy another and wouldn't use it for anything I was really "concerned" about. I will find my manual and try to post it...last time I tried to post an attachment on the forum, I could not. Will see what I can do. If I can't do that, I'll try to do a quick and dirty explanation of the reticle. It's not tough. Back later.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/05/2008 at 19:44
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I have not used the NcStar in a while, wanted to make sure I did not misspeak, and am about to put it on a 7mmMag to see how much "bang" it can take. Here goes...I hope this is understandable. It has two reticles in one, range finding and "choke" type. Range finding is similar to mil-dot, but different.
Range finding reticle:
The line of the reticle is divided into 5MOA increments (approx 5in at 100yd). The width of the line is 1MOA, length of short line is 2MOA, 3MOA, 4MOA, 5MOA. These increments or lengths are used for range estimation, multiple zero points and accurate bullet drop compensation. Any size target can be ranged with this formula: Target size in inches/MOAX100=Range in Yards. To range an object in yds first determine tgt size in inches and divide that number by the amount of MOA measured on the reticle. Multiply by 100 = Range in Yds. EX. Tgt is 18in high and measures 6MOA. Range = 300yd. 18in/6MOAx100=300yd. Once range is determined, select appropriate hold point based upon bullet drop of your cartridge (you need a ballistic chart for your ammo). Vertical spacing can easily be split into 1MOA increments, enhancing long range accuracy.
The choke style rangefinder is simplicity at its best (their words). This type of rangefinder uses two lines that get correspondingly narrower to bracket a fixed sized target. The line can either run vertically or horizontally. Two lines run parallel vertically through the scope field of view, getting narrower towards the bottom. They are calibrated for the width of an average man's shoulders. Numbers indicating various ranges run vertically. To use, simply bracket the shoulders of a man between the lines. Where his shoulders touch both lines is the range...if he is facing directly at or away from you.
I hope that helps. I have scanned the document, but cannot insert the images.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/23/2008 at 13:51
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Originally posted by johnjnam johnjnam wrote:

Hi Dale
 

Im  sorry  but  for  some  reason  I  cant  attach  a  pic here 

 If  you look  at  the  following  web address   it  will show the  type  of  reticle .Thanks  Harald



Picture Harald sent me. 100+year old 303 (shortened) and the scope I sent him the information for.

Pretty cat.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/25/2008 at 13:03
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Originally posted by Kickboxer Kickboxer wrote:


Range finding reticle:
The line of the reticle is divided into 5MOA increments (approx 5in at 100yd). The width of the line is 1MOA, length of short line is 2MOA, 3MOA, 4MOA, 5MOA. These increments or lengths are used for range estimation, multiple zero points and accurate bullet drop compensation. Any size target can be ranged with this formula: Target size in inches/MOAX100=Range in Yards. To range an object in yds first determine tgt size in inches and divide that number by the amount of MOA measured on the reticle. Multiply by 100 = Range in Yds. EX. Tgt is 18in high and measures 6MOA. Range = 300yd. 18in/6MOAx100=300yd. Once range is determined, select appropriate hold point based upon bullet drop of your cartridge (you need a ballistic chart for your ammo). Vertical spacing can easily be split into 1MOA increments, enhancing long range accuracy.
The choke style rangefinder is simplicity at its best (their words). This type of rangefinder uses two lines that get correspondingly narrower to bracket a fixed sized target. The line can either run vertically or horizontally. Two lines run parallel vertically through the scope field of view, getting narrower towards the bottom. They are calibrated for the width of an average man's shoulders. Numbers indicating various ranges run vertically. To use, simply bracket the shoulders of a man between the lines. Where his shoulders touch both lines is the range...if he is facing directly at or away from you.
I hope that helps. I have scanned the document, but cannot insert the images.


OK.. My question is what magnification do you need to have the gun set on to get the reading.. The more magnification you have the bigger his shoulders are gonna be. I need to figure this all out.
I cant find any instruction on the rangefinder recital. I have the 10-40x50 Ncstar on a .223 ar-15.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/25/2008 at 16:51
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The scope must be set on 10X. Also, on the "choke style" range finder, the first line below the crosshair is 100 yds, then 25 yd increments. Only good for about 250yds and only for a "typical" man's shoulder width, which is slightly under 21inches.
I hope that helps.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/08/2008 at 11:01
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Nice cat Harald. Look around on the net and see if you can find an "Mil-Dot Master". It's a must have if you really want to Master the Mil-Dot Scope. They run about $20-$25 in the states, so whatever that works out to in S. Africa it will be worth it. It's a very easy to use sliding scale/instruction manual and will have you knocking them dead @ range in no time.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/25/2016 at 00:16
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Greetings All
Please help me - I am tryi8ng to maximize my chances for an answer to my question:

I just saw your post - regarding the Osprey Rifle Scope 6-24X - from about 8 years back.

I have an Osprey but it is 6-24x 50m with a range finder reticle.  Hardly any details out there on this reticle for Osprey:

I understand the spacing between the hash marks is 5 MOA at 100 yards but at what magnification?

Kickboxer suggested it should be at 10X.  However, is it 10x because his scope was 10-40x and therefore it was set at the LOWEST magnification?  As for my 6-24x scope - do I need to set it at Lowest mag. of 6x at 100 yards to get 5 MOA or  set it at 10X at 100 yards to achieve the 5 MOA?  Please let me know.

Thanks in advance

Khalid
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/30/2016 at 09:29
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When dealing with scopes where you don't exactly trust the quality of the reticle spacing it is often helpful to do an actual measurement with a measuring stick or a target of known size set at 100 meters or yards.

You can adjust power (assuming a SFP reticle) until the spacing matches either 0.1 meters between hash marks at 100 meters or until you reach some even multiple of inches (perhaps 5) at 100 yards.


Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/30/2016 at 19:04
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Thanks, Graysteel!
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