Bob,
I started using 200 Partitions back when they were semi-spitzers, mostly because I was then doing most of my elk hunting in the steep, thick Montana country near the Idaho Panhandle. Shots were NEVER over 100 yards, and the 200 Partition was the deepest-penetrating bullet I could load at the time. (I soon found out it also killed deer well, and didn't shoot up much meat while doing it.)
A few years later Nosler turned it into a real spitzer. I found it worked the same on elk (and deer, and even one pronghorn), but shot just about as flat as any 180. The muzzle velocity in the two .30-06's I've mostly used with the bullet has been 2675-2700 fps. (Recently Bryan Litz's range-tests found the BC is just about exactly what Nosler lists, very close to .500.)
Have killed more elk with the .30-caliber 200 Partition than any other bullet, not just from the .30-06 but a couple of .300 magnums.
It penetrates to well I wouldn't hesitate to use it on brown bear.
