measure bore to scope center

[SuddenDeath]

Hello gentelman,
What is the best way to measure scope center to bore center, I was wanting to play around with some ballistic programs and this measurement is need, I have a guess of 1.875 but I would like to double check it. Thanks

 

[Rthur]

Re: measure bore to scope center

Do you have a caliper?

 

[ChadTRG42]

Re: measure bore to scope center

Take a standard tape measure/ruler and measure from the center of the bore to the center of the scope tube. Also, it's "ballistic".

 

[SuddenDeath]

Re: measure bore to scope center

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ChadTRG42</div><div class="ubbcode-body">Take a standard tape measure/ruler and measure from the center of the bore to the center of the scope tube. Also, it's "ballistic". </div></div>
Yea, I know how to spell it , sometimes my fingers don't hit the right buttons.... LOL....

 

[SuddenDeath]

Re: measure bore to scope center

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rthur</div><div class="ubbcode-body">Do you have a caliper? </div></div>
Yes, I do have a caliper and that is how I came up with a eyeball measurement of 1.875

 

[HN7]

Re: measure bore to scope center

I use a caliper to measure the barrel(d1) and scope(d2) diameter, then measure the space (x) between the scope and the barrel.
Sight Height = x + (d1+d2)/2

 

[Jumper]

Re: measure bore to scope center

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: HN7</div><div class="ubbcode-body">I use a caliper to measure the barrel(d1) and scope(d2) diameter, then measure the space (x) between the scope and the barrel.
Sight Height = x + (d1+d2)/2 </div></div>

Just make sure all three measurements are taken in the same plane. Barrels and scope tubes taper.

 

[BattleAxe]

Re: measure bore to scope center

Where do you take this measurement from if your using an angled base?

Objective, ocular, or between the rings near center?

 

[Lindy]

Re: measure bore to scope center

It doesn't matter. The measurement is not critical. To confirm that for yourself, vary the measurement in a ballistic program by a quarter of an inch, and note how little difference it makes to the calculations.

 

[Rob01]

Re: measure bore to scope center

Here's the pics I post every time this subject comes up. Measure bore to center of windage knob. Been using it for years and it works without a Phd in math.

 

[Whiskey 2-1]

Re: measure bore to scope center

Dont short change yourself, Rob. We all know you are a secret rocket scientist. You and Lindy sneek off after the match and derive the formula for the rate of change of the air density behind a 6.5mm round in the transonic period. It's time to come out of the closet......but just you. Tony can stay IN the closet.


In all seriousness, I measure mine like Rob does. I also did the experimenting that Lindy talks about some time ago and found out it is not as critical as I once thought.

 

[Lindy]

Re: measure bore to scope center

Ha! Rocket science is easy.

If you want something hard, try to figure out what's going on in the mind of a woman.

 

[Graham]

Re: measure bore to scope center

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lindy</div><div class="ubbcode-body">Ha! Rocket science is easy. If you want something hard, try to figure out what's going on in the mind of a woman.

</div></div>The accuracy of which would depend on a unique multiplier derived for each woman.

 

[Mr blasty]

Re: measure bore to scope center

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lindy</div><div class="ubbcode-body">Ha! Rocket science is easy.

If you want something hard, try to figure out what's going on in the mind of a woman.

</div></div>

Debating Coriolis effect sounds 1000 times easier.

 

[Timo Turl]

Re: measure bore to scope center

don't start that one again

 

[Headgear]

Re: measure bore to scope center

That horse is real dead and well kicked.

 

[Chanonry]

Re: measure bore to scope center

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lindy</div><div class="ubbcode-body">Ha! Rocket science is easy.

If you want something hard, try to figure out what's going on in the mind of a woman.

</div></div>

Something is going on in the mind of a woman??!! You must have a different model from me

 

[Chanonry]

Re: measure bore to scope center

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SuddenDeath</div><div class="ubbcode-body">Hello gentelman,
What is the best way to measure scope center to bore center, I was wanting to play around with some ballistic programs and this measurement is need, I have a guess of 1.875 but I would like to double check it. Thanks</div></div>

Guess

 

[Togeneral99]

Re: measure bore to scope center

calipers if you're picky ruler if you just want to know
as others have said ballistics prog.'s don't show much difference