7mmSendaro
Well-Known Member
Would someone give me a detailed description of how to shoot a box test?
HA HA AJ beat me to it!!!!
Now I know what AJ has been doing wrong! He shoots counter clock wise!!
Cam
Thanks guys, just checking.
I am having a difference of opinion with a scope manufacturer on "how to shoot a box test". Strangely when I shoot the scope, it is consistently off with this method. I was sure I was right but wanted to hear it from someone else I know and trust.....thanks.
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.
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.
What scope is it?
AJ