Alagator
You're using more steps than needed.
http://www.jbmballistics.com/~jbm/cgi-bin/jbmtraj-5.0.cgi
Get the Velocity and BC( or the list of built in bullets).
Change the info that applies to you(sight height, temp, altitude....)
Vital Zone....This is important...but your choice.. 4" or whatever you wish
Pick the range increments in yards or meters ... every 10 yards
Now down in the left hand set of check boxes...third down ..
check .....Zero at Max Point Blank
Calculate
Jimmy K
It will give a chart with what you need to sight in
Trajectory
Input Data
Ballistic Coefficient: 0.437 G1 Caliber: 0.257 in
Bullet Weight: 115.0 gr
Muzzle Velocity: 3000.0 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
Temperature: 59.0 °F Pressure: 29.92 in Hg
Humidity: 0.0 % Altitude: 0.0 ft
Vital Zone Radius: 4.0 in
Std. Atmosphere at Altitude: No Pressure is Corrected: Yes
Zero at Max. Point Blank Range: Yes Target Relative Drops: Yes
Mark Sound Barrier Crossing: No Include Extra Rows: No
Round Output to Whole Numbers: No
Output Data
Elevation: 6.471 MOA Windage: 0.000 MOA
Atmospheric Density: 0.07647 lb/ft³ Speed of Sound: 1116.5 ft/s
Maximum PBR: 328 yd Maximum PBR Zero: 280 yd
Range of Maximum Height: 156 yd Energy at Maximum PBR: 1375.1 ft•lbs
Sectional Density: 0.249 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 *** 3007.6 2.694 2309.4 0.000 0.0 ***
10 -0.8 -8.0 0.0 0.1 2984.9 2.674 2274.7 0.010 1.8 16.8
20 -0.2 -1.1 0.0 0.1 2962.4 2.653 2240.6 0.020 3.5 16.9
30 0.4 1.1 0.1 0.2 2940.0 2.633 2206.8 0.030 5.3 17.0
40 0.9 2.1 0.1 0.3 2917.8 2.613 2173.5 0.041 7.1 17.0
50 1.4 2.7 0.2 0.3 2895.6 2.594 2140.7 0.051 8.9 17.1
60 1.9 2.9 0.2 0.4 2873.6 2.574 2108.2 0.061 10.8 17.2
70 2.3 3.1 0.3 0.5 2851.6 2.554 2076.1 0.072 12.6 17.2
80 2.6 3.2 0.4 0.5 2829.8 2.535 2044.5 0.082 14.5 17.3
90 3.0 3.2 0.6 0.6 2808.1 2.515 2013.2 0.093 16.4 17.4
100 3.3 3.1 0.7 0.7 2786.5 2.496 1982.4 0.104 18.2 17.4
110 3.5 3.0 0.8 0.7 2765.0 2.477 1951.9 0.114 20.1 17.5
120 3.7 2.9 1.0 0.8 2743.6 2.457 1921.8 0.125 22.1 17.6
130 3.8 2.8 1.2 0.9 2722.4 2.438 1892.1 0.136 24.0 17.6
140 3.9 2.7 1.4 0.9 2701.2 2.419 1862.8 0.147 25.9 17.7
150 4.0 2.5 1.6 1.0 2680.1 2.400 1833.9 0.159 27.9 17.8
160 4.0 2.4 1.8 1.1 2659.1 2.382 1805.3 0.170 29.9 17.8
170 4.0 2.2 2.0 1.1 2638.2 2.363 1777.0 0.181 31.9 17.9
180 3.9 2.0 2.3 1.2 2617.5 2.344 1749.1 0.193 33.9 18.0
190 3.7 1.9 2.6 1.3 2596.8 2.326 1721.6 0.204 35.9 18.0
200 3.5 1.7 2.8 1.4 2576.2 2.307 1694.4 0.216 37.9 18.1
210 3.3 1.5 3.1 1.4 2555.7 2.289 1667.6 0.227 40.0 18.2
220 3.0 1.3 3.5 1.5 2535.3 2.271 1641.0 0.239 42.1 18.3
230 2.6 1.1 3.8 1.6 2515.0 2.253 1614.9 0.251 44.2 18.3
240 2.2 0.9 4.1 1.6 2494.8 2.234 1589.0 0.263 46.3 18.4
250 1.7 0.7 4.5 1.7 2474.6 2.216 1563.5 0.275 48.4 18.5
260 1.2 0.4 4.9 1.8 2454.6 2.199 1538.3 0.287 50.5 18.6
270 0.6 0.2 5.3 1.9 2434.7 2.181 1513.4 0.299 52.7 18.6
280 -0.0 -0.0 5.7 2.0 2414.8 2.163 1488.8 0.312 54.9 18.7
290 -0.7 -0.2 6.2 2.0 2395.1 2.145 1464.5 0.324 57.1 18.8
300 -1.5 -0.5 6.6 2.1 2375.4 2.128 1440.6 0.337 59.3 18.9
310 -2.3 -0.7 7.1 2.2 2355.8 2.110 1416.9 0.350 61.5 19.0
320 -3.2 -0.9 7.6 2.3 2336.3 2.093 1393.6 0.362 63.8 19.0
330 -4.1 -1.2 8.1 2.3 2316.9 2.075 1370.5 0.375 66.0 19.1
340 -5.1 -1.4 8.6 2.4 2297.6 2.058 1347.8 0.388 68.3 19.2
350 -6.2 -1.7 9.2 2.5 2278.4 2.041 1325.3 0.401 70.6 19.3
360 -7.3 -1.9 9.8 2.6 2259.3 2.024 1303.2 0.415 73.0 19.4
370 -8.6 -2.2 10.4 2.7 2240.2 2.007 1281.3 0.428 75.3 19.4
380 -9.8 -2.5 11.0 2.8 2221.3 1.990 1259.7 0.441 77.7 19.5
390 -11.2 -2.7 11.6 2.8 2202.4 1.973 1238.4 0.455 80.1 19.6
400 -12.6 -3.0 12.3 2.9 2183.6 1.956 1217.4 0.469 82.5 19.7
410 -14.1 -3.3 12.9 3.0 2164.9 1.939 1196.6 0.482 84.9 19.8
420 -15.7 -3.6 13.6 3.1 2146.3 1.922 1176.1 0.496 87.4 19.9
430 -17.3 -3.8 14.3 3.2 2127.8 1.906 1155.9 0.510 89.8 19.9
440 -19.1 -4.1 15.1 3.3 2109.4 1.889 1136.0 0.525 92.3 20.0
450 -20.9 -4.4 15.8 3.4 2091.0 1.873 1116.3 0.539 94.8 20.1
460 -22.7 -4.7 16.6 3.4 2072.8 1.857 1096.9 0.553 97.4 20.2
470 -24.7 -5.0 17.4 3.5 2054.7 1.840 1077.8 0.568 99.9 20.3
480 -26.7 -5.3 18.2 3.6 2036.6 1.824 1059.0 0.582 102.5 20.4
490 -28.9 -5.6 19.1 3.7 2018.6 1.808 1040.4 0.597 105.1 20.5
500 -31.1 -5.9 20.0 3.8 2000.8 1.792 1022.0 0.612 107.7 20.6
Chart does line up better than this !