#### renegadelzard

##### Well-Known Member

- Joined
- Sep 18, 2010

- Messages
- 85

I think im missing something here, so please fix me..here is what is going on. Im building my long range data book and assembling all of the charts and formula's and ive run into a rather strange problem..i have MOA/MOA glass, so using the reticle to range, i have the formula as such

target size in inches x 95.5 / moa measured in reticle...

ive also seen target size in inches/moa measured in reticle x 95.5

both give the same answer..

i also have the ballistic app, and when verifying my answers using the ballistic app rangefinder funtion, i get a different answer

formula:

(72 inches X 95.5)/11moa=625.09 yards

the ballistic app rangefinder calculates it out to 613.9 yards....

Any idea on why this is different? is my formula correct?

Also, using the range as determined by the formula, to calulate the actual horizontal range in yards, i simply multiply the measured range times the cosine of the shooting angle and this will give the actual shooting distance in yards...correct?