Measuring "Scope-Height-Above-Bore"

Dmay

Dmay

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When measuring scope height above bore, to enter into a ballistic program, and assuming an aggressive rail, (45 MOA in my case), where is the proper place to take the measurement? At objective end? At the turrets? What would the reasoning be?

I know, I know, it won't make enough difference to matter, but it's just one of those things I get to wondering about when I wake up in the middle of the night....
 
Measure the objective bell diameter and divide by two, then add that to the bottom measurement. Sorry, I read your question too quickly and overlooked your point, being the impact of the cant of the scope. Interesting question.
 
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I am using Strelok Pro for several years and this how I doit, also people on all forums agree about:
- always shall measure the "scope height" at the windage/elevation mechanism box (or closest point), especially you have a 45 MOA mount.

btw, I never saw 45 before, I have several mounts in 10 and 20 MOA. Is that a side mount?
 
If you do the math, the total cant on a 12" long scope angled at 45 moa is 0.15". So if the centre is the measuring point, you could measure the objective and subtract half that.
 
measure your bolt shaft diameter (under the eye piece), divide by 2
measure your eye piece, divide by two
measure from top of bolt shaft to bottom of eye piece.

add all together and that's your height over bore.

Boltgun
 
I would assume that measuring from the middle of your front ring to the center of the bore about as accurate as its goin to get! This is how Ive done it and it seems to work on the ballistic apps Ive used. Its so simple that even I can do it!!
 
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