Originally Posted by
Bitterroot Bulls
Shooting long range is an involved process no matter which way you do it. A chronograph is essential equipment to me, but the work doesn't end there. Your chronographed muzzle velocities and published bullet Ballistic Coefficients (BCs) are a place to start. You use that info in a ballistic calculator (like JBM) to get data for your load. This should get you close. Then you need to verify and adjust your information with in-the-field shooting. Then you need to understand how elevation and temperture changes affect your drops.
After you get all that down pat, then you need to learn the voodoo of doping wind, and that is a bugger.
BDC reticles are approximate only. You need to verify and adjust those as well. Same with custom dials like those available from Leupold (CDS) and Vortex.
It is kind of complicated to get into, but pretty fun too.