Choosing an average elevation for my Leupold CDS
I have a new Leupold CDS scope for my Remington model 700 LSS in 300RUM. In putting together my ballistic info for the custom dial for my load, I am having trouble choosing an average elevation to set up for.
Like most of us, I hunt all over the west for multiple species and can find myself at various elevation levels, but usually 5000 to 10,000 is within the range. My Leupold Rep tells me that the range of error is about 2000' on either side...in other words if I went with my original figure of 5000', I would be good from 3000 to 7000 feet, more or less. Of course the error will increase at longer ranges, and I haven't done my homework by consulting ballistic charts as to just how much the effect will be, but I'll get around to that soon. I'm sure some of you are well schooled on these numbers, or may have a good source of information to educate me.
I feel the changes in elevation will have a minimal effect on my bullets trajectory except at longer ranges, and realize that it will fly flatter in the higher, thinner air. I also realize that having 2 different dials set up to compensate for extreme elevation changes would be best, but I want to see if I can make the one dial work across the board, even if it means learning to adjust for the extremes.
I originally intended to go with 5000' elevation and 50 degrees temperature, but I am second guessing that after talking with a few fellow hunters/shooters. I am leaning a bit more towards 7500' currently. I'm sure some of you will share opinions that will challenge my thinking on this.
My load consists of a 180 grain Swift Scirocco bullet with a .500 BC leaving the muzzle at 3250 fps.