Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


Reply

Math question on scope adjustment?

 
LinkBack Thread Tools Display Modes
  #1  
Old 11-27-2009, 04:10 PM
Silver Member
 
Join Date: Oct 2009
Location: ILLINOIS
Posts: 323
Math question on scope adjustment?

22-250

I am dead on at 100 yards
My ballistic calculator says at 400yards, come up 4.7 moa or -19.5"

If my scope says 1 click 1/8" how the heck many clicks do I go, and in what direction?

Thanks...i think it is 37.6 clicks in the following the down arrow, but not sure?

Thanks!
Reply With Quote
  #2  
Old 11-27-2009, 04:16 PM
Gold Member
 
Join Date: Aug 2009
Location: Cheyenne
Posts: 513
Re: Math question on scope adjustment?

To be nitpicky, it matters if your clicks are 1/8" or 1/8 MOA. At longer ranges, you'll need more clicks if it's 1/8".

For now we'll assume it's 1/8 MOA for ease of math.

1/8 = 0.125
4.7 MOA / 0.125 MOA per click = 37.6 ~ 38 clicks. So you were right up to this point.

And you want to turn in the UP arrow direction. That will move your POI 4.75" high at 100 yards, and dead on at 400, assuming correct dope.
Reply With Quote
  #3  
Old 11-27-2009, 04:23 PM
Platinum Member
 
Join Date: Jun 2001
Location: Potomac River
Posts: 5,057
Re: Math question on scope adjustment?

The arrow points UP for moving the bullet strike UP. For simple memory " Go UP tp go UP".

There are eight 1/8 per inch. You want to move up 4.7 IPHY then that is 4X8 = 32 clicks plus 0.7 IPHY = 6 clicks Total is 32+6 =38

If your scope is set up in inches then you need to toogle the units in your ballistic calculator so it gives you IPHY instead of MOA. Life will be simpler and more accurate
__________________
The Smokin Fur Rifle Club
Reply With Quote
  #4  
Old 11-27-2009, 04:27 PM
Platinum Member
 
Join Date: Mar 2007
Location: MN
Posts: 1,219
Re: Math question on scope adjustment?

just to add to what BB said... most scopes in the US are IPHY. Nikon, bushnell, Tasco, redfield, burris...

your upperend and European scopes are usually MOA.
__________________
I used to re-load but now I "hand-load".
-- Well, at least I try --
Reply With Quote
  #5  
Old 11-27-2009, 04:39 PM
Gold Member
 
Join Date: Oct 2007
Posts: 880
Re: Math question on scope adjustment?

Funny story,

A few years ago I got all anal about the whole inch/moa thing. I was not real sure about my Leupold scope.....did it move in inches or moa. I called Leupold for the answer. I talked to several people up the food chain and they all said the same thing...."MOA and inches mean the same thing". When I asked them if 30 MOA and 30 inches at 1000 yards is EXACTLY the same....they said....."YES.....EXATLY" !!!!!!


Go figure.

To this day I am not sure. How about NF Scopes.

Last edited by 4xforfun; 11-27-2009 at 05:46 PM.
Reply With Quote
  #6  
Old 11-27-2009, 05:15 PM
Silver Member
 
Join Date: Oct 2009
Location: ILLINOIS
Posts: 323
Re: Math question on scope adjustment?

Can I check this at 100 yards by aiming at the bull, and the bullet should hit 19.5" high?
Reply With Quote
  #7  
Old 11-27-2009, 05:29 PM
Gold Member
 
Join Date: Aug 2009
Location: Cheyenne
Posts: 513
Re: Math question on scope adjustment?

Quote:
Originally Posted by WEATHERBY460 View Post
Can I check this at 100 yards by aiming at the bull, and the bullet should hit 19.5" high?
No. It'll be 4.7" high at 100.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Math question on scope adjustment?
Thread Thread Starter Forum Replies Last Post
Scope adjustment range question...help please!!! hmbleservant Rifles, Bullets, Barrels and Ballistics 3 11-15-2010 05:10 PM
Burris Scope Adjustment Question Cameron The Basics, Starting Out 1 06-27-2010 10:42 PM
Re: Rifle Adjustment question kfrye Long Range Hunting & Shooting 0 08-28-2009 01:04 PM
Scope adjustment question Water Swatter Long Range Scopes and Other Optics 8 02-27-2008 12:53 PM
Question...How far will 25 MOA adjustment get you W/30.06 fourinone The Basics, Starting Out 3 02-05-2006 06:28 AM

Current Poll
Do you archery hunt for elk?
YES - 32.14%
81 Votes
NO - 50.79%
128 Votes
Not yet, but I plan to. - 17.06%
43 Votes
Total Votes: 252
You may not vote on this poll.

All times are GMT -5. The time now is 11:40 AM.


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