Purpose is to determine the actual sight ANGLE of a 'golden' load to compare with other experimental loads. Sighting a rifle with the golden load (tested and verified fps - POI). Then compare (simulate) other loads, with known BC and fps. Object is to save time/$ and get an idea of the 'cone of fire' at different ranges (less than 100 in my case).
so far it appears BC has very little to do with POI for HV stuff. Change BC, sight angle and POI don't hardly change.
Program to calculate the real sight angle for a given load.
All are 30 cal, which makes no difference in the program.
bore to sight height angle (for 100 yds) is really small,
input is 2300 fps, 1.5" sight height. 100 yd zero.
125gr sst
input BC: .305
angle :0.172245
POI: 0.146728
150ssp
input BC: .388
angle :0.172245
POI: 0.146917
110 vmax
input BC: .29
angle :0.172245
POI: 0.146682
145 cast 31-142D mould
input BC: .22 a guess!!
angle :0.172245
POI: 0.146389
so far it appears BC has very little to do with POI for HV stuff. Change BC, sight angle and POI don't hardly change.
Program to calculate the real sight angle for a given load.
All are 30 cal, which makes no difference in the program.
bore to sight height angle (for 100 yds) is really small,
input is 2300 fps, 1.5" sight height. 100 yd zero.
125gr sst
input BC: .305
angle :0.172245
POI: 0.146728
150ssp
input BC: .388
angle :0.172245
POI: 0.146917
110 vmax
input BC: .29
angle :0.172245
POI: 0.146682
145 cast 31-142D mould
input BC: .22 a guess!!
angle :0.172245
POI: 0.146389