Murf,
This is what I do when running my version of Exbal <font color="blue">(Tools, About Exbal, a screen shows saying: Exbal Version 5.6) </font> which works for different elevations at long distances:
Run Exbal click on File, New --- it might ask you wheather or not you want to save the changes for what you were running. Answer by clicking "Yes" or "NO". In the text field on top, type in a name for the load, click the icon to save, give it a name and click "OK".
Now we're ready to start inputting information.
Click on top Button that says "Bullet Data", input all needed information (I zero at 100 yards) and click "Update". It goes back to opening screen.
<font color="green">From Perry (Exbal Programmer):
The second logical form is the "Field Conditions" form, which has input fields to specify muzzle velocity and current atmospheric conditions at the target location. These include altitude, temperature, pressure (not corrected to sea level), and relative humidity. A check box is used to indicate that system should calculate pressure based on altitude.
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Now, I click the next button down "Field Conditions" fill in the Altitude, (NOTE: <font color="red">Unless you don't you the target pressure, all the information on this screen has to be for the actual altitude or elevation that you are zeroing your rifle for. Other wise it would defeat the purpose when you go elk hunting at 10,000 ft elevation </font>.) Temperature, uncheck "Calculate Standard Pressure" unless that's what you intend to use to zero your rifle in. Get a reading from your Kestrel 4000 in in/Hg and fill it in as well as the "relative Humidity". Click Update.
At this point all your "zero in" information has been entered. We're ready to shoot the rifle. But first let's save "sight in conditions", so when you go to 10,000 ft elevation, the program knows at what conditions the rifle was sighted in and compensates for our new conditions.
Click on "Program Options" button, click on "Save Sight-in Conditions" if "Use Field Conditions" is Checked, it already broght in this screen the info. we input. Let's Uncheck "Use Field Condition" so we keep our zero conditons.
When you do that, "Calculate Standard Pressure" gets checked automatically, uncheck it! <font color="blue">The reason you uncheck it is because your Kestrel 4000 can give you the target pressure. If you want the program to calculate the pressure based on the altitude then leave it checked. </font> Click Update and we're done.
At this point I'd click on the save icon.
Let's say now (at the same location) you want to shoot at a rock at 700 yards, here's what I do:
On the opening page, click on "Target Engagement" fill in all the info. in that screen.
NOTE: For wind directions remember you're always in the center of the clock, your target is 12:00 O'clock. If the wind is hitting you 90º to your right then type in Wind From "3". If it's 90º left then type in "9". If it's just passed between 9 and 12:00 you may want to call it "11" and so on.
NOTE: If you're using the "Cosine Indicator" to messure the vertical angle, check the circle next to cosine and if the indicator reads 87 make sure you enter 0.87; if you messure the angle in degrees, then make sure the (deg) is checked first and then enter 30º.
Once all is entered click "Update". Takes you back to the opening screen. Click "Calculate" and dial it in.
Now you want to shoot at 850 yards, in the same screen just type 850 click on "Recalculate" and dial it in.
Now you move to 10,000 ft elevation.
Go to the opening screen, click on "Field Conditions" fill in all info as before, click "Update" click "Target Engagement" fill info. as before, click "Update" click "Calculate" and you're ready to go. If the wind changes, click "OK" click "Target Engagement" make the change, click "Update" click "Calculate" and you're back in bussiness.
You don't have to rezero the rifle, the program remembers your zero conditions and you'll be impressed how now at 700 yards you will dial in less than before.
/ubbthreads/images/graemlins/blush.gif I know this is probably way more than what you were asking but it may help someone else.
Good Luck!
