I see in ballistic programs it asks for the scopes height over the bore.
What is the easiest, most accurate way to measure this?
What is the easiest, most accurate way to measure this?
How to measure scope over bore
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Re: How to measure scope over bore
Diameter of the action, divided by two = A.
Diameter of the scope tube, divided by two = B.
Gap between scope & action = C.
A + B + C = distance between bore axis and scope axis, or "scope height over bore".
Using this method, we can get within a few thousandths, but that is more precise than we actually need.
If you look at some ballistics charts run with some variation in this number, you'll note that within 1/4" is close enough for most applications. Most folks can eyeball within 1/4" just holding a scale or rule against the side of the rifle.....
Diameter of the action, divided by two = A.
Diameter of the scope tube, divided by two = B.
Gap between scope & action = C.
A + B + C = distance between bore axis and scope axis, or "scope height over bore".
Using this method, we can get within a few thousandths, but that is more precise than we actually need.
If you look at some ballistics charts run with some variation in this number, you'll note that within 1/4" is close enough for most applications. Most folks can eyeball within 1/4" just holding a scale or rule against the side of the rifle.....
Re: How to measure scope over bore
As Ed notes, if you experiment with a ballistics program, you'll find that changes of a quarter inch make little appreciable difference to the program output.
So, keep it simple, and just use a ruler or a tape measure.
As Ed notes, if you experiment with a ballistics program, you'll find that changes of a quarter inch make little appreciable difference to the program output.
So, keep it simple, and just use a ruler or a tape measure.
Re: How to measure scope over bore
Open the bolt, measure from center of the bolt to center of the scope.
Open the bolt, measure from center of the bolt to center of the scope.
Re: How to measure scope over bore
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KS</div><div class="ubbcode-body">How could it get any easier than the way Rob does it?</div></div>Have someone else do it.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KS</div><div class="ubbcode-body">How could it get any easier than the way Rob does it?</div></div>Have someone else do it.
