Long story short. I can only sight in at my place at a distance of 80 yards.
Going on an Axis hunt and don't want to wait until I get there to sight in.
So, I'm wanting to know how high to be at "0" at 200 yards
I'm exactly 3" high at 80 yards.
Shooting Hornady 30-06 Springfield 150 gr InterLock® SP American Whitetail.
On the box it say's, 1.8 inches high at 100 is "0" at 200.
Any help is truly appreciated.
I should have paid closer attention while in high school math.

You need to remember that if you sight in this way, your zero is at best an estimation. Due to the scope being mounted raised above bore, and your sight in point causing the barrel to "tip" upwards, your bullet will still be on an upward arc until it crosses the line of sight. Therefore, at 80 yards, you will need to be below that 1.8" suggestion as your POI is still rising compared to your POA. Variances in your point of impact would leave a best guess of a centered group at approximately 1.4". Still, I would find that 200 yard range to confirm.

https://press.hornady.com/assets/pcthumbs/tmp/1410994454-2017-Standard-Ballistics-Chart.pdf

Mr T, it takes understanding a little more than basic math to answer your question. I shoot a 3006 and even though I dont share your sighting in problem, ill be awaiting some expected knowledgeable replies.

Id rather zero at 80 and guess how much drop there is at 200 than guess how high i have to hit at 80 to be on at 200.

With run of the mill factory ammo assuming their bc and velocity is right a similar style federal 150 grain, sighted at 80 yards would be less than 4 inches low at 200 holding dead on.

Ran this on JBM Ballistics. Looks like you should be about 1.4" high at 80 yds for a 200 yd zero. Correction, it reads 1.4" at 80 yds.

Trajectory
Input Data
Manufacturer: Hornady Description: InterLock® Spire Point
Caliber: 0.308 in Weight: 150.0 gr
Ballistic Coefficient: 0.338 G1 (ASM)

Muzzle Velocity: 2910.0 ft/s Distance to Chronograph: 10.0 ft

Sight Height: 1.50 in Sight Offset: 0.00 in
Zero Height: 0.00 in Zero Offset: 0.00 in
Windage: 0.000 MOA Elevation: 0.000 MOA
Line Of Sight Angle: 0.0 deg Cant Angle: 0.0 deg

Wind Speed: 10.0 mph Wind Angle: 90.0 deg
Target Speed: 10.0 mph Target Angle: 90.0 deg
Target Height: 12.0 in

Temperature: 90.0 °F Pressure: 29.92 in Hg
Humidity: 40 % Altitude: 800.0 ft

Vital Zone Radius: 5.0 in

Std. Atmosphere at Altitude: No Pressure is Corrected: Yes
Zero at Max. Point Blank Range: No Target Relative Drops: Yes
Mark Sound Barrier Crossing: No Include Extra Rows: No
Column 1 Units: 1.00 in Column 2 Units: 1.00 MOA
Round Output to Whole Numbers: No
Output Data
Elevation: 5.147 MOA Windage: -1.736 MOA

Atmospheric Density: 0.06958 lb/ft³ Speed of Sound: 1149.4 ft/s

Maximum PBR: 339 yd Maximum PBR Zero: 289 yd
Range of Maximum Height: 161 yd Energy at Maximum PBR: 1455.1 ft•lbs

Sectional Density: 0.226 lb/in²
Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
0 -1.5 *** 0.0 *** 2918.9 2.540 2837.3 0.000 0.0 ***
20 -0.5 -2.4 -0.3 -1.6 2865.5 2.493 2734.5 0.021 3.7 17.4
40 0.3 0.8 -0.6 -1.4 2812.8 2.447 2634.7 0.042 7.4 17.6
60 1.0 1.5 -0.8 -1.2 2760.6 2.402 2537.8 0.063 11.2 17.8
80 1.4 1.7 -0.9 -1.1 2709.0 2.357 2443.9 0.085 15.0 17.9
100 1.7 1.6 -0.9 -0.9 2658.0 2.313 2352.8 0.108 19.0 18.1
120 1.8 1.4 -0.9 -0.7 2607.6 2.269 2264.3 0.131 23.0 18.3
140 1.7 1.1 -0.8 -0.6 2557.7 2.225 2178.5 0.154 27.1 18.5
160 1.3 0.8 -0.6 -0.4 2508.4 2.182 2095.3 0.177 31.2 18.6
180 0.8 0.4 -0.4 -0.2 2459.6 2.140 2014.6 0.202 35.5 18.8
200 -0.0 -0.0 0.0 0.0 2411.3 2.098 1936.3 0.226 39.8 19.0
220 -1.0 -0.4 0.4 0.2 2363.6 2.056 1860.3 0.251 44.2 19.2
240 -2.3 -0.9 1.0 0.4 2316.3 2.015 1786.8 0.277 48.8 19.4
260 -3.8 -1.4 1.6 0.6 2269.6 1.975 1715.4 0.303 53.4 19.6
280 -5.6 -1.9 2.3 0.8 2223.5 1.935 1646.3 0.330 58.1 19.8
300 -7.7 -2.5 3.1 1.0 2177.8 1.895 1579.4 0.357 62.9 20.0

Thank you a lot.

Check your scope height before you begin. It will vary based on the height of your scope base, rings, and diameter of the glass. All my scopes have 40mm objective lenses with medium height bases which yield a scope height of 2 inches from the centerline of the bore axis to that of the scope. You should have no problem eyeballing it with a ruler.

Using the Nikon Spot On app and a scope height 2 inches, you need only be 1.19 inches high at 80 yards for a 200 yard zero using that specific factory load. At 80 yards, the bullet will still be rising to it's maximum height above the scope's (cross hair) axis of 1.7 inches at roughly 125 yards, and you'll still be good for a kill shot (heart and lungs) with no holdover (3 inches low) at 250 yards.

As others have suggested, it's always best to field test at the actual zero distance if possible.

For what it's worth, the same app shows a bullet from that load being 3.24 inches high (close to your current setting) at 80 yards would yield a 300 yard zero. However, it would reach a maximum height of 5.4 inches above the scope axis at roughly 175 yards, putting the bullet outside the ethical kill zone at that distance. Not a very flat shooting trajectory no doubt.

Nikon SpotOn App

Yall are all so much smarter than me on this stuff. I practically shoot just the one rifle so Ive never learned up on this stuff too much. But now you got me curious. If OP doesnt mind me jumping in I would like Big Fitz or some other guy that knows this stuff to tell me about my 3006.
165 Nosler Partition at 2800 fps sighted in at 2.2" high at 100. Can someone spit out all that cool info like Big Fitz did it would be appreciated. Ive shot it enough to know what it does in real life but curious what the techno stuff says.

Freerange, I just plug in the numbers on line at JBM Ballistics. There are may on-line ballistic calculators. Your 165 Partition yields the below chart for your bullet at 2800 fps.

Trajectory
Input Data
Manufacturer: Nosler Description: Partition (Litz)
Caliber: 0.308 in Weight: 165.0 gr
Ballistic Coefficient: 0.188 G7 (ICAO)
Muzzle Velocity: 2800.0 ft/s Distance to Chronograph: 10.0 ft
Sight Height: 1.50 in Sight Offset: 0.00 in
Zero Height: 0.00 in Zero Offset: 0.00 in
Windage: 0.000 MOA Elevation: 0.000 MOA
Line Of Sight Angle: 0.0 deg Cant Angle: 0.0 deg
Wind Speed: 10.0 mph Wind Angle: 90.0 deg
Target Speed: 10.0 mph Target Angle: 90.0 deg
Target Height: 12.0 in
Temperature: 90.0 °F Pressure: 29.92 in Hg
Humidity: 40 % Altitude: 800.0 ft
Vital Zone Radius: 5.0 in
Std. Atmosphere at Altitude: No Pressure is Corrected: Yes
Zero at Max. Point Blank Range: No Target Relative Drops: Yes
Mark Sound Barrier Crossing: No Include Extra Rows: No
Column 1 Units: 1.00 in Column 2 Units: 1.00 MOA
Round Output to Whole Numbers: No
Output Data
Elevation: 5.441 MOA Windage: -1.614 MOA
Atmospheric Density: 0.06958 lb/ft³ Speed of Sound: 1149.4 ft/s
Maximum PBR: 333 yd Maximum PBR Zero: 283 yd
Range of Maximum Height: 157 yd Energy at Maximum PBR: 1605.7 ft•lbs
Sectional Density: 0.248 lb/in²
Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
0 -1.5 *** 0.0 *** 2807.7 2.443 2887.8 0.000 0.0 ***
20 -0.4 -2.1 -0.3 -1.5 2761.5 2.403 2793.5 0.022 3.8 18.1
40 0.4 1.0 -0.5 -1.3 2715.7 2.363 2701.6 0.043 7.6 18.3
60 1.1 1.7 -0.7 -1.2 2670.3 2.323 2612.1 0.066 11.6 18.4
80 1.6 1.9 -0.8 -1.0 2625.4 2.284 2524.8 0.088 15.6 18.6
100 1.9 1.8 -0.9 -0.8 2580.8 2.245 2439.9 0.111 19.6 18.7
120 1.9 1.5 -0.9 -0.7 2536.7 2.207 2357.1 0.135 23.7 18.9
140 1.8 1.2 -0.8 -0.5 2493.0 2.169 2276.6 0.159 27.9 19.1
160 1.4 0.9 -0.6 -0.3 2449.7 2.131 2198.2 0.183 32.2 19.2
180 0.8 0.4 -0.3 -0.2 2406.8 2.094 2122.0 0.208 36.6 19.4
200 -0.0 -0.0 0.0 0.0 2364.4 2.057 2047.8 0.233 41.0 19.6
220 -1.1 -0.5 0.4 0.2 2322.4 2.021 1975.8 0.259 45.5 19.7
240 -2.4 -1.0 0.9 0.4 2280.9 1.985 1905.8 0.285 50.1 19.9
260 -4.0 -1.5 1.5 0.5 2239.9 1.949 1837.8 0.311 54.8 20.1
280 -5.9 -2.0 2.1 0.7 2199.2 1.913 1771.7 0.338 59.5 20.3
300 -8.1 -2.6 2.9 0.9 2159.1 1.878 1707.6 0.366 64.4 20.5
320 -10.6 -3.2 3.7 1.1 2119.3 1.844 1645.3 0.394 69.3 20.7
340 -13.4 -3.8 4.6 1.3 2079.9 1.810 1584.7 0.422 74.3 20.9
360 -16.5 -4.4 5.7 1.5 2041.0 1.776 1525.9 0.451 79.5 21.1
380 -19.9 -5.0 6.8 1.7 2002.4 1.742 1468.7 0.481 84.7 21.3
400 -23.7 -5.7 8.0 1.9 1964.2 1.709 1413.2 0.511 90.0 21.5

Do a 50 yard zero, you should have a max point blank range of about 225 yards. Meaning holding on a vital zone the bullet with pass through the vital area from 0 to 225, of course you should prove it and actually shoot 200 yards.
The 50 yard zero should be a true zero and not an inch high.

Big Fitz, thanks, but I think you misunderstood me or Im reading info wrong. Im NOT interested in a 200 zero. I shoot mine in at about 2.2" high at 100 and I think that gives me a zero at about 215. Thats what I was wanting to get the various POI yardages based on.
And, yes, Im sure its easy for most to just plug it into that calculator but Im just a little tech hesitant. If it was important enough I could probably figure it out.
I also think it may be closer to 2850 but not sure.

Here it is a 2.2" high at 100 with 2850 fps velocity yielding about a 220 yd zero.

Trajectory
Input Data
Manufacturer: Nosler Description: Partition (Litz)
Caliber: 0.308 in Weight: 165.0 gr
Ballistic Coefficient: 0.188 G7 (ICAO)
Muzzle Velocity: 2850.0 ft/s Distance to Chronograph: 10.0 ft
Sight Height: 1.50 in Sight Offset: 0.00 in
Zero Height: 0.00 in Zero Offset: 0.00 in
Windage: 0.000 MOA Elevation: 0.000 MOA
Line Of Sight Angle: 0.0 deg Cant Angle: 0.0 deg
Wind Speed: 10.0 mph Wind Angle: 90.0 deg
Target Speed: 10.0 mph Target Angle: 90.0 deg
Target Height: 12.0 in
Temperature: 90.0 °F Pressure: 29.92 in Hg
Humidity: 40 % Altitude: 800.0 ft
Vital Zone Radius: 5.0 in
Std. Atmosphere at Altitude: No Pressure is Corrected: Yes
Zero at Max. Point Blank Range: No Target Relative Drops: Yes
Mark Sound Barrier Crossing: No Include Extra Rows: No
Column 1 Units: 1.00 in Column 2 Units: 1.00 MOA
Round Output to Whole Numbers: No
Output Data
Elevation: 5.724 MOA Windage: -1.744 MOA
Atmospheric Density: 0.06958 lb/ft³ Speed of Sound: 1149.4 ft/s
Maximum PBR: 339 yd Maximum PBR Zero: 288 yd
Range of Maximum Height: 160 yd Energy at Maximum PBR: 1652.9 ft•lbs
Sectional Density: 0.248 lb/in²
Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
0 -1.5 *** 0.0 *** 2857.8 2.486 2991.7 0.000 0.0 ***
20 -0.4 -1.8 -0.3 -1.6 2811.2 2.446 2894.9 0.021 3.7 17.8
40 0.5 1.3 -0.6 -1.4 2764.9 2.406 2800.4 0.043 7.5 17.9
60 1.3 2.1 -0.8 -1.3 2719.1 2.366 2708.4 0.065 11.4 18.1
80 1.9 2.2 -1.0 -1.1 2673.7 2.326 2618.7 0.087 15.3 18.2
100 2.2 2.1 -1.0 -1.0 2628.7 2.287 2531.2 0.109 19.3 18.4
120 2.4 1.9 -1.0 -0.8 2584.1 2.248 2446.1 0.132 23.3 18.6
140 2.4 1.6 -1.0 -0.7 2539.9 2.210 2363.2 0.156 27.4 18.7
160 2.1 1.3 -0.9 -0.5 2496.2 2.172 2282.5 0.180 31.6 18.9
180 1.7 0.9 -0.6 -0.3 2452.9 2.134 2204.0 0.204 35.9 19.0
200 0.9 0.5 -0.4 -0.2 2410.0 2.097 2127.6 0.229 40.2 19.2
220 -0.0 -0.0 0.0 0.0 2367.5 2.060 2053.3 0.254 44.7 19.4
240 -1.2 -0.5 0.4 0.2 2325.5 2.023 1981.1 0.279 49.2 19.6
260 -2.6 -1.0 1.0 0.4 2284.0 1.987 1910.9 0.305 53.7 19.7
280 -4.4 -1.5 1.6 0.5 2242.9 1.951 1842.8 0.332 58.4 19.9
300 -6.4 -2.0 2.3 0.7 2202.3 1.916 1776.6 0.359 63.2 20.1
320 -8.6 -2.6 3.0 0.9 2162.0 1.881 1712.3 0.386 68.0 20.3
340 -11.2 -3.1 3.9 1.1 2122.2 1.846 1649.8 0.414 72.9 20.5
360 -14.1 -3.7 4.9 1.3 2082.9 1.812 1589.2 0.443 78.0 20.7
380 -17.3 -4.3 5.9 1.5 2043.9 1.778 1530.2 0.472 83.1 20.9
400 -20.8 -5.0 7.1 1.7 2005.2 1.745 1472.9 0.502 88.3 21.1

Didn't know your sight sight above bore and used 1.7 (high rings) This is from the Hornady Ballistic site, with the BC for the 165gr partition. To get your 2.2 at 100 I had to use 218 as the zero range. Just saved a copy of the cheat sheet