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Newbie: Leupold Varmint Reticle Help

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/25/2007 at 23:20
gspam1 View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: March/24/2007
Location: United States
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Points: 4

I just purchased a VX-III 4.5-14x40mm with the Varmint Hunters Reticle.  I've read through the instructions and watched the little DVD video and it seems very simple.  Maybe too simple for me to figure out what is going on :)

 

The charts show calibers and bullet weights when choosing either the large or small triangle setting on the magnification dial.  Am I correct in thinking:

 

1.  bullet drop at distance is the determining factor in the charts?

2.  At either of the triangle settings, and using a cartridge with ballistics within the specific bullet drop range of values, the elevation marks on the reticle will be correct even if using a bullet weight not shown in the chart?

3.  At any other magnification setting besides the two triangles, the elevation lines in the reticle will not be correct?

 

It seems like they've done a great job designing a system that is fast and simple and works well in the most common hunting situations.

 

Thanks,

 

George

 

 

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/26/2007 at 01:06
sscoyote View Drop Down
Optics Journeyman
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Good posting Gspam. You're asking all the right questions.

 

As a general rule the stadia lines are set up for an average of all the trajectories they elected to survey when setting up the reticle for the 2 triangle subtensions (measurements) , but there are some that won't fit with either one. I have this very reticle on a Savage Striker handgun in 243 WSSM, and i'm shooting a target bullet at reduced velocities. U can bet they didn't take that into acount when they made this reticle. All my windage is about 1/2 of the 10 mph stadia.

 

When you're out shooting look thru the scope as u adjust the power ring. U will notice that when u move it the lines will be moving up and down along your tgt. if u keep the x-hair centered on one spot. You should be able to intuitvely see what's happeneing here, and how it relates to the trajectory of your cartridge. Obviously not every load is gonna be zeroed at even 100 yd. intervals, and there are a number of ways to deal with this. Suppose your load shoots lower than the larger triangle at each mark, but higher on the smaller triangle. You could adjust the magnification between the triangles to get a better trajectory to reticle fit, or adjust your zero slightly one way or the other.

 

Here is a good source of info on how to adapt reticles for downnrange zeroing--

 

www.burrisoptics.com   Tech Notes on Ballistic Plex.



Edited by sscoyote
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/26/2007 at 08:42
RifleDude View Drop Down
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Originally posted by gspam1 gspam1 wrote:

  Am I correct in thinking:

 

1.  bullet drop at distance is the determining factor in the charts?

2.  At either of the triangle settings, and using a cartridge with ballistics within the specific bullet drop range of values, the elevation marks on the reticle will be correct even if using a bullet weight not shown in the chart?

3.  At any other magnification setting besides the two triangles, the elevation lines in the reticle will not be correct?

 

1.  Yes, or more specifically, it is a function of velocity and ballistic coefficent.

2.  No.  It may be close though, depending on how far off that weight the selected bullet is.

3.  Correct.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/26/2007 at 10:57
gspam1 View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: March/24/2007
Location: United States
Status: Offline
Points: 4

Thanks sscoyote and RifleDude, I appreciate the help!

 

Thanks for the Burris link sscoyote - lots of excellent info there.

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