Originally Posted by JeffP40
First off, don't just assume it is the scope. There are a lot of other variables to consider. Atmospheric conditions can make a huge difference in poi. Take it out and shoot it some more. Put some of your ammo on ice in a cooler and keep some pretty warm. Compare the drops of the two. A lot of the difference may come from temp. Humidity can also affect poi. You said it returned to zero, so it is probably not the scope. Shoot quite a bit more and see what happens.
Don't think so.....Lets assume for argument that he is shooting the 168 berger at 2600. You would need to drop down to under 2300 to lower impact points my 2.5 moa.
Temp.... I max out my seirra program (130f to -30f) and am around 4 inches of change.
There is not enough humidity on earth to make much difference at 500 yards.
Also, if he is using a comp program to figure his come ups, he is probably already imputting the enviromental conditions.
It is either a garbage in garbage out situation with the program or a scope issue.
Just my .02