Agree. I've taken 1 head shot and that was at under 30yds on a bedded buck with his back to me.
As for the 300 RUM being over kill, it depend on the conditions. Western KS I've used .300WM for open country. I don't look at it so much as "overkill" as it is using a rifle that's not set up for the conditions I'm hunting.
My open country rifles; .300WM and .270Win have 24" barrels and higher magnification scopes. They also have ARCA plates mounted to their stocks for clamping in a tripod. Shots out west can be longish. Both of these rifles kind of suck in a stand and blind, too cumbersome and too much MV for the distances I'm hunting at. I've also got a 26" barreled 8mm Mag, another "open country" rifle that really sees limited to zero use.
My "normal" deer rifles, used for blinds, stands, still hunting, and drives use intermediate cartridges, short actions, 20" barrels and 1.25- 8X scopes. Most of the places I hunt on the east side a 300yd shot is a long ways, and that's only overwatching row crop fields. This season, other than the MT mule deer hunt, I've been focused on hunting wooded terrain. So the "long shooters" are remaining racked and my M7s in .260Rem and .350RM are getting used.
The "I only take X shots briefs well", but sometimes all I get is a quartering shots. During drives and still hunts, I take some shots that most guys on the internet would pass on. Putting a 3100+ FPS cartridge through a shoulder at the closer ranges leaves a mess of dog food.