Sight height over bore list

[Clavius-Walker]

Anyone know of a list somewhere or maybe have some jotted down somewhere, thinking it might be a useful resource for people (me included) using some of these ballistic calculators for distances out past where they can readily verify them.

Something like, Rem 700, Weaver 20MOA pic base, NF low 30mm rings = 1.775"


Heck, a good standardized measurement list of components would help too, seems mfgrs tend to measure heights differently.

 

[Catfish]

Height above bore depends on height of rings and bases so it can vary a fair amount with a given scope on a given rifle. I alway measure if I`m wanting exact. The lower the rings the closer the near zero will be and the higher the farther the near zero will be, and it can vary by several yards, a lot more than the far zero, so if your working with just close always zero at the rifle at the far zero. Max. point blank range will change vary little.

 

[Clavius-Walker]

Right, I know it changes with bases and rings, that's why I was asking if anyone had any data on what height certain bases and rings result in....

 

[watercam]

???? Just finish your build, get the scope or sights at your optimum and measure mid-bore to mid-sight line. It is not likely you will be choosing components to suit a trajectory calculation.

 

[jr600yd]

Remove barreled action from stock
1. Measure diameter of scope bell
2. Measure diameter of barrel
3. Measure from top of scope bell to bottom of barrel
4. Add #1 + #2
5. Subtract this # from #3
This tells you how much space the scope sits above the barrel.
6. Divide #1 and #2 in half and add together, add #5
7. This is the height the center of your scope is above the center of the bore.

 

[LRPV]

I was thinking today, yes it hurt a little, but does it make a difference where you take the measurements? With a 20 MOA base, the scope will be closer to the centerline than it will be back at the turrets. To be perfect, one would need to know where exactly the crosshairs reside in the scope and measure at that point right? I mean really that's the pivot point. Might be taking it a little too far, I don't know.

 

['Freak]

I was thinking today, yes it hurt a little, but does it make a difference where you take the measurements? With a 20 MOA base, the scope will be closer to the centerline than it will be back at the turrets. To be perfect, one would need to know where exactly the crosshairs reside in the scope and measure at that point right? I mean really that's the pivot point. Might be taking it a little too far, I don't know.

The back to front downward slope would be all of ~ .000291” times the number of MOA times the number of inches in the run.

 

[Clavius-Walker]

So yeah, I know how to do it, have done it in the past, quite a few times actually but was just wondering if there might be the chance of compiling a list of the data outside of what I have but I can see that concept doesn't quite make sense here.

 

[6MMsteve]

cheat sheet

 

[Clavius-Walker]

cheat sheet

exactly, we've got them for just about everything else

 

[eddief]

Measure from the bottom of your scope tube to the top of your bolt body. Then add to this figure 1/2 dia of scope tube and 1/2 dia of bolt body.

 

[Clavius-Walker]

Measure from the bottom of your scope tube to the top of your bolt body. Then add to this figure 1/2 dia of scope tube and 1/2 dia of bolt body.

wow.....just....wow

 

[rifleman700]

This measurement does not have to be exact to be used with a ballistic solver. A simple ruler will get you as close as you need to be.

 

[fredhorace77]

Make one and share it with us.

So yeah, I know how to do it, have done it in the past, quite a few times actually but was just wondering if there might be the chance of compiling a list of the data outside of what I have but I can see that concept doesn't quite make sense here.

 

[dkhunt14]

This measurement does not have to be exact to be used with a ballistic solver. A simple ruler will get you as close as you need to be.

Depends on how far you are shooting. matt

 

[rifleman700]

Here is an article on ballistic solvers written by Todd Hodnet. Todd owns Accuracy First and they train the US military snipers. If you read down in the article he mentions bore height - BH and makes the statement that it is not critical to get it exactly right. He only devotes 2 sentences to BH. I have shot out to 2000 yards with a 338L with only a rough measurement taken of my scope / bore height with no issues. For example, cant is far, far more critical at ELR than the correct scope / bore height measurement.

http://www.accuracy1stdg.com/content/docs/A1DG_Website_Info/Ballistic_Solvers.pdf

 

[savagedasher]

I asume most here have not shot archery . Peep hight in relationships to knock Changes everything thing . Scope hight is the same .
Larry

 

[rifleman700]

Apples and oranges. We are talking scope / bore height as it pertains to using it with a ballistic solver.