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Please help with rangefinder reticle |
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johnjnam
Optics GrassHopper Joined: April/23/2008 Location: Namibia / Afric Status: Offline Points: 3 |
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Posted: April/23/2008 at 08:06 |
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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 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
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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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???
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johnjnam
Optics GrassHopper Joined: April/23/2008 Location: Namibia / Afric Status: Offline Points: 3 |
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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 .
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johnjnam
Optics GrassHopper Joined: April/23/2008 Location: Namibia / Afric Status: Offline Points: 3 |
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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
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supertool73
Optics God Superstool Joined: January/03/2008 Status: Offline Points: 11814 |
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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.
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Lifetime warranty and excellent customer service don't mean a thing when your gun fails during a zombie attack.
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supertool73
Optics God Superstool Joined: January/03/2008 Status: Offline Points: 11814 |
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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 |
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Lifetime warranty and excellent customer service don't mean a thing when your gun fails during a zombie attack.
"A Liberal is a person who will give away everything they don't own." |
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Kickboxer
MODERATOR Moderator Joined: February/13/2008 Status: Offline Points: 23679 |
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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.
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Kickboxer
MODERATOR Moderator Joined: February/13/2008 Status: Offline Points: 23679 |
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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. |
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Kickboxer
MODERATOR Moderator Joined: February/13/2008 Status: Offline Points: 23679 |
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Picture Harald sent me. 100+year old 303 (shortened) and the scope I sent him the information for. Pretty cat. |
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officerkrc
Optics GrassHopper Joined: July/25/2008 Location: Burkburnett TX Status: Offline Points: 2 |
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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. |
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Kickboxer
MODERATOR Moderator Joined: February/13/2008 Status: Offline Points: 23679 |
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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. |
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CavscoutSniper
Optics GrassHopper Joined: August/08/2008 Location: Texas Status: Offline Points: 14 |
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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.
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CavscoutSniper
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kmansour111
Optics GrassHopper Joined: March/24/2016 Location: Denver Status: Offline Points: 2 |
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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 Thanks in advance Khalid
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Enjoying Colorado and my Second Amendment rights
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Graysteel
Optics Apprentice Joined: October/02/2007 Location: United States Status: Offline Points: 200 |
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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. |
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kmansour111
Optics GrassHopper Joined: March/24/2016 Location: Denver Status: Offline Points: 2 |
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Thanks,
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Enjoying Colorado and my Second Amendment rights
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