There ARE so many "Issues" about,.. Elevation at, Rifles "Zero" vs the Elev at, the Hunt area, Wind speed, Bullet Spin Drift, My Ammo's Velocity in, COLD weather, etc. All that, chit, can drive a guy, nuts !
I try to, put ALL that stuff, out of my mind by doing my "best" on all of,.. IT !
THEN, I try to, just GET CLOSER to, the Big Game that, I'm hunting, so all that THAT "chit" really doesn't come into "play" for me, due to choosing, the TERRAIN, I Hunt. I don't sit on, a Ridge, "looking" to shoot Game on, the next Mountain, across, the Valley.