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Understanding Leupold's VHR

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/03/2011 at 23:01
03mossy View Drop Down
Optics Apprentice
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I ordered a VX3 6.5-20x40LR with the VHR. I would like some help in understanding Leupold's Varmint Hunters Reticle and how it works... I understand the basics that it needs to be set on a certain power to get the lines to match up (it's going on a 22-250). Where i get confused is when people start talking "staida" lines or what ever there called and MOA between lines and "substentions" of the reticle. Can someone please dumb this down for me a bit so i can better understand how to use this scope when it comes and help me get it dialed in at the range.
 
 
Thanks
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/04/2011 at 00:36
8shots View Drop Down
Optics Jedi Knight
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Lord Of The Flies

Joined: March/14/2007
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This is what you will be looking at. The important part to know is that on a second focal plane scope the reticule will appear to grow or shrink in relationship to the target as you zoom in or out. So once you have "doped"your scope you must use that same zoom setting when engaging targets.
The substentions or hash marks going down vertically gives you different aimpoints to adjust for elevation.
The substentions going left and right horizontally gives you different aimpoints for windage.
Firstly you have to zero the scope at a given distance, say 100 yds. So use the normal aimpoint on the reticule and get the scope and rifle zeroed.
You are now set to go.
 
Take a 1 inch grid of A4 paper and place at 100 yds. Now dial through the zoom settings and note the inches (MOA) for each substention.
 
This should give you something like:
15 x Zoom first down = 2 inches
second down = 5 inches
3rd down = 13 inches
4th down = 18 inches.
 
Now go to JBM ballistics and get your rifle bullet combo ballistcs and match it to a specific zoom setting that fits best.
 
A bit of work, but once done it works well. This dope must be kept on a cheat sheet.
 
The other way is to shoot on the range at each distance, say 200 yds 300 yds and then see which magnification fits to get you zeroed.
 
The windage dots can be used in that each dot corresponds to wind  speed in increments of x mph. So a 5 mph wind and two hundred yards you will use the first substention down and the first dot left or right.
 
Hope this helps.


Edited by 8shots - February/05/2011 at 02:00
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/04/2011 at 09:25
03mossy View Drop Down
Optics Apprentice
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8shots-Thank you very much! That was extremly helpful!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/04/2011 at 14:07
Dale Clifford View Drop Down
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with a 22-250 and that reticle its even simpler, on fast or flat cartridges such as the 250 sight in for 200 yds with the first horizontal bar. The next horizontal will be 300 yds and the next 400 etc. use the scope on its highest mag or the largest triangle if they are not the same.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/05/2011 at 01:59
8shots View Drop Down
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Thanks Dale for catching this one and the PM:
 
Correction on SFP: In the second focal plane the reticle stays the same size as the image increases or decreases in size with the power setting, so the reticle covers more area on low power, and less area on a higher power.
 
I did not specify "in relationship to the target"on my first post, which I have corrected.


Edited by 8shots - February/05/2011 at 02:04
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/08/2011 at 14:45
03mossy View Drop Down
Optics Apprentice
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I went to jbmballistics website and.... holy information overload!!!! That site just highlights how much I don't know about optics and ballistics! Life was just so much simplier when I just hunted with a muzzleloader, all I had to know was "hold on hair". Thanks again for the tips, now I got some studying to do.
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