Hopefully I didn't miss where this was clearly stated in other posts;
I'm trying to find some more information on the "mph gun" wind technique. From what I understand you get the G1 BC of the bullet and multiply it by 10, and that is the Mph you base your chart on. I.e 175 SMK G1 BC = .474 x 10 = 4.7mph gun or 4.5mph gun for a easier number. Then if I'm correct the chart would as follows:
@ 4.5 mph
100yds = 0.1 mil
200yds = 0.2 mil
300yds = 0.3 mil
400yds = 0.4 mil
500yds = 0.5 mil
600yds = 0.7 mil
700yds = 0.8 mil
800yds = 0.9 mil
900yds = 1.0 mil
1000yds = 1.1 mil
Then if you have a 9 mph full value wind @ 500yds you double your value i.e 0.5 mil @ 4.5mph x 2 = 1.0 mil @ 9mph. Seems straight forward so far?
My question is if there's any flaws with what I understand so far? What about past 1000yds, are there any other jumps like there is at 700yds? Anything else that I'm missing? And lastly if station pressure or different muzzle velocity ranges have a effect of this, if so what are the fps standards for what mph range, and how do we account for these exceptions? Thanks guys
I'm trying to find some more information on the "mph gun" wind technique. From what I understand you get the G1 BC of the bullet and multiply it by 10, and that is the Mph you base your chart on. I.e 175 SMK G1 BC = .474 x 10 = 4.7mph gun or 4.5mph gun for a easier number. Then if I'm correct the chart would as follows:
@ 4.5 mph
100yds = 0.1 mil
200yds = 0.2 mil
300yds = 0.3 mil
400yds = 0.4 mil
500yds = 0.5 mil
600yds = 0.7 mil
700yds = 0.8 mil
800yds = 0.9 mil
900yds = 1.0 mil
1000yds = 1.1 mil
Then if you have a 9 mph full value wind @ 500yds you double your value i.e 0.5 mil @ 4.5mph x 2 = 1.0 mil @ 9mph. Seems straight forward so far?
My question is if there's any flaws with what I understand so far? What about past 1000yds, are there any other jumps like there is at 700yds? Anything else that I'm missing? And lastly if station pressure or different muzzle velocity ranges have a effect of this, if so what are the fps standards for what mph range, and how do we account for these exceptions? Thanks guys