Re: Slope/Angle ballistics (again!)
DAVE, I dont have the tables with me but I think I remember most of it.I didn't put this in at first because it gets a little complicated(for most).Theres three other things you have to account for -TEMP-BP-AMMO TEMP.First you will need a scientific calculater.
Where going to use my gun.
30cal 220gr BC .640 MV 2820 sighted in at 100yds in starderd condtions.
For BP if its up-multiple by constant,if down divide.
For temp if its up divide by constant,if down multiply.
Here's the shot 1200yds,30 deg. angle,BP 27.55,temp 84 deg.,ammo temp 84 deg.
First we find the slant range 30cos*1200yds=1039
Then the diff. in BP. 1.980. the constant for 1200yds is 1.0367 (I think)
enter 37.4 divide by 1.0367 hit "xy" key enter 1.980(the diff. in BP) hit =34.82398 this goes where BP is on the table.
find the diff. in temp. 25deg. the constant for 1200y is 1.03426
enter 37.4 hit divide enter 1.03426 hit "xy" key enter the diff. in temp (here you move the the decimal point to the left) 2.5 hit =34.37931 this goes in temp on table.
find the diff. in ammo temp. 14deg. the general rule of thumb is +/- 1MOA for every 50fps. diff. in temp. where going to use -.25MOA this goes in the ammo temp table.
Remember that you use the TRUE RANGE for all calculations.After you get EACH new MOA elevation setting subtract EACH one of them from your intial setting,and put them in the space labled DIFF.
INT.MOA SETTING DIFF.
TRUE RANGE 1200y 37.4MOA
SLANT RANGE 1039y 29.3MOA
BP 27.55 34.82398MOA -2.57602MOA
TEMP 84 34.37931MOA -3.02069MOA
AMMO TEMP 84 25deg change -.25MOA
Add all the differences up and subtract or add them to the SLANT RANGE moa setting.Here it comes to 23.45329MOA THIS THE REAL SETTING YOU PUT ON THE SCOPE.This is the setting you would use.
WHEW [img]images/icons/shocked.gif[/img] I know this was kind of long and its not exact because I dont have the tables with me,but its close.The bullet does have to fly through 1200yds. of air.This is how we account for it.
For everybody that wants first round hits at longrange,past 800yds or so YOU MUST MAKE THESE CORRECTIONS!!!!!
SINCERLY THE GRIM REAPER...
[ 02-23-2002: Message edited by: SEALSNIPER ]
[ 02-24-2002: Message edited by: SEALSNIPER ]