I've been trying out multiple ammo types through my Kimber 7mm-08 Adirondack with an 18" barrel. I've tested the Hornady American Whitetail 139gr interlock, Nosler Balistic tip 120gr, and Norma Soft Point 150gr.
The Norma 150gr groups best (about 1"), Hornady second best (about 1.5"), and Nosler was about a 2"group. My rifle seems to like the heavier bullet.