Here is the post I promised you Roy. It will be a very brief explanation of the 3 data input screens on the Big Game Info ballistic calculator as I understand them. I sent an email to the creator of the site but it was rejected as a email no longer in use. I was hoping he would come help me out.
I will explain each screen shot and at the end I will use this info to demonstrate how I set and adjust my scope. From there you will need to ask questions untill it makes sence to you. You should be able to shoot a range with a laser and dial for range in seconds. Then you should be able to make a judgement on wind and dial accordingly again within a few seconds. When done shooting you should be able to reset your scope to zero to wait for another day.
Here we go. /ubbthreads/images/graemlins/cool.gif
Once you open the websites advanced ballistic calculator and log in if you wish you will view the "load definition" page. It will look like this.
Muzzle velocity and chrono distance should be easy enough. If you set your chrono at 10 feet from the muzzle then put this in the field and input the velocity the chrono gives you. This program will calculate the MV backwards from 10 feet when we get to the data output fields.
Zero range is the distance you want to call home. We have discussed this before. I reccomend a 100 yard zero. Dont worry about fast shots on coyotes here. We will handle that neatly later on. If you are shooting a gun like the MOAG then you may want to change this to a greater distance but I really believe that for now 100 wil suit our needs.
Height is where someone might put 2 inches if they are shooting 2 inches high at 100 so they can shoot coyotes on the move at 300 and be zeroed at around 200. FOR NOW OUR GUN WILL BE ZEROED AT 100 WITH A HEIGHT OF 0. We are hitting the center of our 100 yard target.
In Bullet start with a drag function of G1. This is standard. Later, if you wish you can compare the other drag functions. GI (used in this screen shot) and GL are fairly close to some of the ULD designs if I'm not mistaken. Regardless, you can experiment with those later.
You will see that I entered 3 BC values for your bullet. The designer of this program did that to allow the info that the Sierra website gives you. Just enter the BC and the top velocity it is listed for. If you only have one BC value then put it in the top cell and give it a velocity max of 5000.
Sights height is the center of the scope to the center of the bore.
Clicks / MOA is the nember of clicks per MOA for your scope. This will effect the way the results will appear so get this one right.
Elevation is NOT your altitude. Leave a 0 in this cell untill later on. The calculator will tell you what to put here later. As you see in the screen shot I have entered a value. I'm sorry but even after an explanation from the site owner I still don't understand what this "elevation" does exactly. Most of the time I leave a 0 in it.
Next page coming.
<font color="red"> Please hold other responses untill I get all 5 images of this lesson posted.Thanks. </font>
I will explain each screen shot and at the end I will use this info to demonstrate how I set and adjust my scope. From there you will need to ask questions untill it makes sence to you. You should be able to shoot a range with a laser and dial for range in seconds. Then you should be able to make a judgement on wind and dial accordingly again within a few seconds. When done shooting you should be able to reset your scope to zero to wait for another day.
Here we go. /ubbthreads/images/graemlins/cool.gif
Once you open the websites advanced ballistic calculator and log in if you wish you will view the "load definition" page. It will look like this.
Muzzle velocity and chrono distance should be easy enough. If you set your chrono at 10 feet from the muzzle then put this in the field and input the velocity the chrono gives you. This program will calculate the MV backwards from 10 feet when we get to the data output fields.
Zero range is the distance you want to call home. We have discussed this before. I reccomend a 100 yard zero. Dont worry about fast shots on coyotes here. We will handle that neatly later on. If you are shooting a gun like the MOAG then you may want to change this to a greater distance but I really believe that for now 100 wil suit our needs.
Height is where someone might put 2 inches if they are shooting 2 inches high at 100 so they can shoot coyotes on the move at 300 and be zeroed at around 200. FOR NOW OUR GUN WILL BE ZEROED AT 100 WITH A HEIGHT OF 0. We are hitting the center of our 100 yard target.
In Bullet start with a drag function of G1. This is standard. Later, if you wish you can compare the other drag functions. GI (used in this screen shot) and GL are fairly close to some of the ULD designs if I'm not mistaken. Regardless, you can experiment with those later.
You will see that I entered 3 BC values for your bullet. The designer of this program did that to allow the info that the Sierra website gives you. Just enter the BC and the top velocity it is listed for. If you only have one BC value then put it in the top cell and give it a velocity max of 5000.
Sights height is the center of the scope to the center of the bore.
Clicks / MOA is the nember of clicks per MOA for your scope. This will effect the way the results will appear so get this one right.
Elevation is NOT your altitude. Leave a 0 in this cell untill later on. The calculator will tell you what to put here later. As you see in the screen shot I have entered a value. I'm sorry but even after an explanation from the site owner I still don't understand what this "elevation" does exactly. Most of the time I leave a 0 in it.
Next page coming.
<font color="red"> Please hold other responses untill I get all 5 images of this lesson posted.Thanks. </font>