Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > The Basics, Starting Out


Reply

Dumb Question MOA Adjustment

 
LinkBack Thread Tools Display Modes
  #1  
Old 11-11-2011, 06:34 PM
HJW HJW is offline
Bronze Member
 
Join Date: Oct 2011
Posts: 71
Dumb Question MOA Adjustment

Okay, so I'm thinking of getting a Leupold VX-II 6-18x40.
It has 56 MOA of elevation, which means 28 up/28 down.
I currently have a Nightfoce 20 MOA rail on my gun, so
does this mean it will give me 10 up/10 down as well? Or
20 up?

I ask this because if it is only 10 up this will put me at 38
MOA adjustment up for elevation, and I am looking for a
little more.


Best Regards,


Hunter
Reply With Quote
  #2  
Old 11-11-2011, 07:24 PM
Gold Member
 
Join Date: Aug 2009
Location: Cheyenne
Posts: 514
Re: Dumb Question MOA Adjustment

You'll have 48 up/8 down, if you compare to the same point on a 0 moa rail.
Reply With Quote
  #3  
Old 11-11-2011, 07:28 PM
HJW HJW is offline
Bronze Member
 
Join Date: Oct 2011
Posts: 71
Re: Dumb Question MOA Adjustment

Quote:
Originally Posted by NomadPilot View Post
You'll have 48 up/8 down, if you compare to the same point on a 0 moa rail.
Thank you. Care to explain anyone?
Reply With Quote
  #4  
Old 11-11-2011, 07:50 PM
Gold Member
 
Join Date: Aug 2009
Location: Cheyenne
Posts: 514
Re: Dumb Question MOA Adjustment

With your 20 MOA base, you'll have the same "zero line," but that line will be 20 MOA off what it would be with a 0 MOA base. Your zero will shift 20 MOA. So, that gives you 20 MOA more of travel in that direction (back towards mechanical zero), at the cost of travel in the other direction (away from mechanical zero).



Top picture shows no cant. Zero line bisects the scope travel.

Bottom picture shows "20 MOA" cant. Zero line is offset to the top of the triangle, so you have an extra 20 MOA of travel on the large side.

Last edited by NomadPilot; 11-11-2011 at 07:56 PM.
Reply With Quote
  #5  
Old 11-11-2011, 08:41 PM
HJW HJW is offline
Bronze Member
 
Join Date: Oct 2011
Posts: 71
Re: Dumb Question MOA Adjustment

Quote:
Originally Posted by NomadPilot View Post
With your 20 MOA base, you'll have the same "zero line," but that line will be 20 MOA off what it would be with a 0 MOA base. Your zero will shift 20 MOA. So, that gives you 20 MOA more of travel in that direction (back towards mechanical zero), at the cost of travel in the other direction (away from mechanical zero).



Top picture shows no cant. Zero line bisects the scope travel.

Bottom picture shows "20 MOA" cant. Zero line is offset to the top of the triangle, so you have an extra 20 MOA of travel on the large side.
That was very informative, thank you!
Reply With Quote
  #6  
Old 11-12-2011, 09:32 PM
Bronze Member
 
Join Date: Jul 2005
Posts: 63
Re: Dumb Question MOA Adjustment

Just to complicate things a little...

In the real world, you will likely not actually end up with a total of 48 MOA elevation available.

That's because it's normal to use up some elevation when sighting the rifle in. This can vary from rifle to rifle, but sighting in can easily use up 10 MOA or more.

If that's the case you may well end up with only 38 MOA UP available.

While that is a usable number., you could go to a 25 or 30 MOA base and gain elevation back, but you might want to look at some other scopes before you make your final decision. I'm not sure that particular scope is the best choice even in Leupold's line up.

TC

Last edited by Top Cat; 11-12-2011 at 09:54 PM.
Reply With Quote
  #7  
Old 11-12-2011, 11:19 PM
Silver Member
 
Join Date: Feb 2010
Location: Smalltown, Virginia
Posts: 408
Re: Dumb Question MOA Adjustment

Just to mix it up...

What if you were to get the 20MOA base... AND the Burris signature rings with the MOA offset inserts that could grant you up to 30 MORE MOA if you buy the kit for like 14 bucks... But thats just an idea.. your scope is going to be tilted something serious!
__________________
"...I shoot big cartridges, not because I am ego bound, not because they are needed to kill big game when well placed shots are made, but when an error is made, they will get you out of trouble more often then a lesser round."

--Kirby Allen
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Dumb Question MOA Adjustment
Thread Thread Starter Forum Replies Last Post
This may be a dumb question mattbowen Hog Hunting 20 08-07-2011 12:35 AM
Dumb Question? cmiller36 Long Range Scopes and Other Optics 1 05-03-2009 10:29 PM
A dumb question due to a dumb rifle driver royinidaho General Discussion 3 08-24-2008 12:01 PM
DUMB Question... really dumb magnificcation question.. but PLEASE HELP superlite17 Long Range Scopes and Other Optics 6 06-05-2007 08:48 AM
Probably a dumb question!?!?!?!? lerch General Discussion 5 04-30-2006 12:42 AM


All times are GMT -5. The time now is 01:56 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC