Measuring "Scope-Height-Above-Bore"

[Dmay]

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....

 

[call2arms]

If I was concerned about it I would go with the center. Kinda of an average measurement point

 

[Grizzlypeg]

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.

 

[boxhitch]

imo at the turrets, where the reticle should be.... maybe, idk
easy place to measure tube to bolt with calipers

 

[jimbo14]

Applied Ballistics says to measure at the windage turret.

 

[bigHUN]

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?

 

[Grizzlypeg]

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.

 

[Hand Skills]

I thought this was pretty nifty;