Long Range Hunting Online Magazine


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

Long Range Hunting & Shooting Nightforce Optics


Reply

Box Test

 
LinkBack Thread Tools Display Modes
  #8  
Old 07-06-2009, 09:07 PM
Platinum Member
 
Join Date: Feb 2004
Location: Pennsyltucky
Posts: 2,623
Re: Box Test

because i use 30 or so moa in the verticle and a handful on the horizontal, i perform what i call a diamond test. same thing as a box test only different. use a piece of paper that's 4 ft tall and at least a couple ft wide. target is close to the bottom because i'm about 3" high at 100 and shoot one round. i always go clockwise, not for any particular reason, just what i do. up 15moa and left 7. fire one round. up 15 and right 7. down 15 and right 7. down 15 and left 7. i only shoot one round each time and i'm also cranking the scope verticly and horizontally each time. this prints 4 groups that are in a diamond, 30" from top to bottom and 14" apart horizontally. this is the amount of travel i use the scope so i test it using the entire range it will be used.
i've also mounted the scopes on a 22 and performed this test at 25 yards. a bit cheaper on ammo and no barrel wear on the big boys.
Reply With Quote
  #9  
Old 07-06-2009, 09:17 PM
Platinum Member
 
Join Date: Oct 2005
Location: Michigan
Posts: 2,232
Re: Box Test

DaveWilson, +1, I like your method, as it moves up and over each time.

AJ
__________________
If some is good and more is better, then too much is just right.


My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
Reply With Quote
  #10  
Old 07-07-2009, 07:12 AM
Gold Member
 
Join Date: Feb 2007
Location: Central Illinois
Posts: 901
Re: Box Test

Quote:
Originally Posted by AJ Peacock View Post
What are your measurements? Is it consistently moving corner to corner, or not returning to center? Let us know, I'm intrigued.

Thanks,
AJ
My Dad has three identical scopes. We shot box tests using a 4" square at 100 yards. All three scopes returned to zero perfectly. However, when using the method you described, the corner groups were consistently 1.5 to 2 MOA off. We ended up with a square that was approximately 5.5" inches to 6 inches instead of 4 inches.

This all started because shooting drop data, his .243 showed only a 1 MOA drop at 300 yards when zeroed at 200. We knew that was not quite right and began investigating. It has been a very disturbing deal, especially when all three of these scopes show the same condition.
Reply With Quote
  #11  
Old 07-07-2009, 10:35 AM
Platinum Member
 
Join Date: Oct 2005
Location: Michigan
Posts: 2,232
Re: Box Test

Quote:
Originally Posted by 7mmSendaro View Post
My Dad has three identical scopes. We shot box tests using a 4" square at 100 yards. All three scopes returned to zero perfectly. However, when using the method you described, the corner groups were consistently 1.5 to 2 MOA off. We ended up with a square that was approximately 5.5" inches to 6 inches instead of 4 inches.

This all started because shooting drop data, his .243 showed only a 1 MOA drop at 300 yards when zeroed at 200. We knew that was not quite right and began investigating. It has been a very disturbing deal, especially when all three of these scopes show the same condition.

What click value does the mfg say the scope has? If you are using 1/4moa and doing 16clicks, but the scope is actually 1/10mil (.36"), then 16clicks would equal 5.76" at 100yds.

fwiw: I don't know what your .243 load is, but a 55gr varmit bullet at 3750fps will drop about 1.5" from 200yds to 300yds. That is almost exactly .4mil drop (would be 4 clicks in a .1mil scope), would appear to be 1moa thinking the clicks are 1/4moa.

What scope is it?

Thanks,
AJ
__________________
If some is good and more is better, then too much is just right.


My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives

Last edited by AJ Peacock; 07-07-2009 at 10:58 AM.
Reply With Quote
  #12  
Old 07-07-2009, 12:52 PM
Gold Member
 
Join Date: Feb 2007
Location: Central Illinois
Posts: 901
Re: Box Test

Quote:
Originally Posted by AJ Peacock View Post
What click value does the mfg say the scope has? If you are using 1/4moa and doing 16clicks, but the scope is actually 1/10mil (.36"), then 16clicks would equal 5.76" at 100yds.

fwiw: I don't know what your .243 load is, but a 55gr varmit bullet at 3750fps will drop about 1.5" from 200yds to 300yds. That is almost exactly .4mil drop (would be 4 clicks in a .1mil scope), would appear to be 1moa thinking the clicks are 1/4moa.

What scope is it?

Thanks,
AJ
Scope is an 1/8 MOA per click. The .243 load is a 95 grain Gameking. Don't remember his exact specifications, but the drop should have been in the 2 MOA neighborhood.
Reply With Quote
  #13  
Old 07-07-2009, 12:57 PM
Platinum Member
 
Join Date: Oct 2005
Location: Michigan
Posts: 2,232
Re: Box Test

Quote:
Originally Posted by 7mmSendaro View Post
Scope is an 1/8 MOA per click. The .243 load is a 95 grain Gameking. Don't remember his exact specifications, but the drop should have been in the 2 MOA neighborhood.

What scope is it?

AJ
__________________
If some is good and more is better, then too much is just right.


My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
Reply With Quote
  #14  
Old 07-07-2009, 01:01 PM
Gold Member
 
Join Date: Feb 2007
Location: Central Illinois
Posts: 901
Re: Box Test

Quote:
Originally Posted by AJ Peacock View Post
What scope is it?

AJ
PM sent in keeping with new rules.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Box Test
Thread Thread Starter Forum Replies Last Post
test Bud General Discussion 0 09-27-2006 01:43 PM

Current Poll
Where in the US do you live?
West of the Mississippi River - 60.06%
770 Votes
East of the Mississippi River - 37.60%
482 Votes
On the Mississippi River on a houseboat - 2.34%
30 Votes
Total Votes: 1,282
You may not vote on this poll.

All times are GMT -5. The time now is 07:49 AM.


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