I have just started working on long range shooting and have problems with my calculations. I can think of several reasons why they would be off and wonder what's the best order for the process of elimination. The problem has happened with two different rifles and I am usually off .5 to 2 MOA always high. Shooting from 400 to 500 yards. Today I was off about 2moa at 470 yards. I have used online calculators and charts in my reloading books, which both come out the same.
I shoot on flat ground, the velocities I use to calculate are averaged over many rounds and conditions, some taken the same day.
The optics are Leupold and Vortex, but I have never verified them. Should this be done at 100yds?
I have no rangefinder, how reliable is Google earth? I'm using very easy to see landmarks, and think I'm getting good measurements on the program. I have also used measuring wheels that you walk behind, GPS and other things.
I'm about 800' elevation shooting at around 70 degrees F, little to no wind.
Possible problems I can think of:
The bullet is traveling faster than I think
The range is shorter than I think
The adjustments on the optics are not accurate
My shooting form
Any more Ideas?
I shoot on flat ground, the velocities I use to calculate are averaged over many rounds and conditions, some taken the same day.
The optics are Leupold and Vortex, but I have never verified them. Should this be done at 100yds?
I have no rangefinder, how reliable is Google earth? I'm using very easy to see landmarks, and think I'm getting good measurements on the program. I have also used measuring wheels that you walk behind, GPS and other things.
I'm about 800' elevation shooting at around 70 degrees F, little to no wind.
Possible problems I can think of:
The bullet is traveling faster than I think
The range is shorter than I think
The adjustments on the optics are not accurate
My shooting form
Any more Ideas?