The 300WSM with the 215 Bergers is a great pairing for me. I use to use the 185 & 190 Bergers and loved the performance, but the 215's are just so much better. I am trying to get the 400 to 1,000 yard shot on deer, but gotta take what the good Lord sets before you. My Savage 16BVSS will shoot sub ¾ MOA at 550 yards out to 800 yards all day long as long as I do my part. I am getting 2870 MV out of 67 grains of H4831SC. I have 8 to 10 reloads per brass case plus the original factory load on them and all is good.
I just returned from a week long deer hunt just east of the Texas Big Bend area taking 3 white tail from 270 to 240 yards. Exit wounds were all in excess of three inches, all were DRT (dead right there) dropped in their tracks. Last year was a single Oklahoma buck at 300 yards, DRT after a 7 yard stumble. In the area we hunt in you do not want your deer wandering off unless you like a stroll through dense sticker, thorn and cactus bushes plus boot crawlers and mesquite.