Re: MOA and Temperature
Yes temps have a HUGE impact on trajectory like pressure does. Humidity has the least effect in regards to enviormental influences. Temp and pressure make up the majority of air density. Altitude only effects pressure. In the end, it is the raw pressure that determines bullet flight and not altitude in and of itself.
Play with a ballistic calculator a bit and you will see that air density has a HUGE factor on bullet trajectory.
My 308 has a difference of over 10MOA (over 100") of drop at 1000 yards between the -10 degrees/sea level that I practice in versus the 60 degree/5000' above sea level that I hunt dall sheep in.
Just changing from -10 to 60 degrees (staying at sea level) changes the drop at 1K by nearly 60". Thats just the difference in 70 degrees of temp spread.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.