Scope Height

[darrohn801]

I was just curious if you guys all measure your thermal scope height the same way you do with traditional scopes? I always take a ruler from the center of the barrle to the center of the scope to get my scope height for calculating the ballistics on my bullets. I'm getting about 2.75'' on most of the night vision/thermal scopes. Is there any difference on calculating this with digital/electronic scopes compared to traditional scopes?

 

[FrankT]

nope, the distance is what you type in same as a standard scope

 

[pruhdlr]

Yep,same as regular scope. All you are adding to the "equation" is how far out the bullet will cross the line of sight,twice during it's flight. --- pruhdlr

 

[ZenArchery]

Ya. I believe mines 2.25?

 

[Curly Shuffle]

On ARs you are right but with thermals they are set into the equation already. I do not think you can do anything about the height or I have not see or heard of anything you can do to set it any different from what it is?? BANG BANG!!
Most scopes on ARs are from the two and a quarter to the 2 and 3/4s. Each person is different but for the most part on scopes for ARs folks have the high rings or the extra high rings. That is the nature of the beasts!

 

[theblakester]

My reap is about 2.75" from the bore to the center of the germanium lens. That's what I've been going by.

 

[FrankT]

Curly he is not talking shooting or sighting in but properly plugging in the numbers(and scope height is one of them) to run a ballistic chart for drops at various distances. That way you do not have to shoot 300-500 yards as the chart will tell you your drops for what distance. I carry one for every ammo and gun/scope combo I have.

 

[Curly Shuffle]

Curly he is not talking shooting or sighting in but properly plugging in the numbers(and scope height is one of them) to run a ballistic chart for drops at various distances. That way you do not have to shoot 300-500 yards as the chart will tell you your drops for what distance. I carry one for every ammo and gun/scope combo I have.

Yes I know I guess I did not word it right for you. So,, I will add this.?

Yes measure from the center of the barrel to the center of the scope. You should have a ballistics runup for each setup you have. There is not difference in the scopes just the scope height. When you run mildot or MOA most charts will give you both. There is a good one on the Trijicon site but it takes a few steps to get there. BANG BANG!!

Sorry about the added not needed info. Hands and brain do not act right these days!! BANG BANG!!

 

[FrankT]

Curly, sorry I thought you were thinking something else from what you typed, I did not want anyone confused more than I am

 

[Chopperdrvr]

Frank, I thought you stayed confused. Didn't you tell me you were from the "state" of confusion?

 

[pruhdlr]

Just go to - - - -> JBM Calculations (Trajectory). Add your info . . print it out . . cut it out . . tape it to the stock of the weapon.
Bullet velocity is more imprtant than B.C. Scope height above bore line is semi important. That's it. --- pruhdlr

 

[keatonskidmore]

Just go to - - - -> JBM Calculations (Trajectory). Add your info . . print it out . . cut it out . . tape it to the stock of the weapon.
Bullet velocity is more imprtant than B.C. Scope height above bore line is semi important. That's it. --- pruhdlr

Eh. I'd say B.C. Is equally as important as velocity..

 

[pruhdlr]

All else being equal change B.C. from .250 to .300 and check the difference.
Now change the velocity of a .277" bullet from 2700fps to 2800fps and check the difference. --- pruhdlr