Lots of great observations and advice.
Reason I originally asked is that we have a cut over that will be perfect this year and some shots have the potential to be fairly long.
Interesting a friend let me borrow his range finder today. I measured a distance that I thought was 300 yards and it was 190. Poor judge of distance I guess. So frankly, I doubt I will be taking any shots at 300 as initially posted. 200 will be challenging enough.
Have a 223 with the same optics and ammo less expensive than 270 wsm with almost identical drop at 200 so will practice a lot with that. Will shoot off knee pod or rest simulating buddy stand to make it more realistic.