Unless you need to shoot the Barnes; (Lead free zone). I believe you should shoot the 215 Berger. You said it yourself, the amount of times you read the post by Broz. It is just a awesome bullet out of the 300 WM.Thanks for sharing . Same deal really can't find to much about them. Need Broz to do a test on these like he did the berger 215. Can't tell you how many times I have read that thread.
The 200gr LRX is what I am going to be hunting with this fall. This bullet is the one I have had the best luck with in load development for my 300 winmag. I have not been able to hunt with them yet but I hear good things from others who have. I am shooting out to 550 yards with mine, that is the distance at which I am comfortable, and am consistently shooting between a 4" and 5" group.