Re: Ballistic software and effectiveness
If you input accurate info, it will output scary accurate info. You need accurate velocity, temperature, barometric pressure and humidity and drag model with appropriate BC, scope hight, zero range ect...... All these need to be very accurate to receive accurate results.
Now, 4.5 MOA of difference at 600 yards from one day to the next in even your extreeme temp change is a way more than normal. With a loss of 100 FPS from colder temps, which is WAY overkill AND the denser air combined, you should not be any more than 1.0 MOA difference between 80 degrees and 50 degrees at 600 yards. In short, NO, ballistic software will not help this issue. It can and will help you with many issues but not the issue of 4.5 MOA at 600 yards. First make sure your scope is set right and that you didnt miscalculate something. Once you figure all that out, then the software can help you better.
You asked how much temperature affects the shot. An example would be using your rig with a 225 accubond at 3000 FPS with a 250 yard zero gives you a drop of 8.75 MOA at 600 yards near sea level in 80 degree air. Change nothing but temp to 50 degrees and it 8.95. So 0.2 MOA for 30 degrees at 600 yards. Now at 1K it changes exactly 1.0 MOA. Barometric pressure has a big affect as well but still, 4.5 MOA difference at 600 yards is something else.
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.
Last edited by Michael Eichele; 01-13-2009 at 08:50 PM.