I have a newer Kimber 8400 Montana in 300WSM. With Federal Premium 180 Nosler Partitions, I get 1" groups or better at 100 yards. Keep in mind that this is a LIGHT rifle and that, generally speaking, all else being equal, a light rifle will not be as accurate as a heavier one.
As such, 1" groups, from any gun, are good, and from a light gun like the Kimber, are exceptional.
Zachary