Here you are, Bob--though I ran the numbers at 3050, not 30350 (was that from the .270 Weatherby?)--

Drop: -273
Wind drift: 41
Remaining velocity: 1425

Looks like we have a winner! So dump those Bobs and Swedes and come on over to the O'Connor side....

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck