Badgerben:
Depends on which model rifle you've got.
The older '89's can't take high pressure, but I've got one thats been rechambered to .30-30.
A simple chamber reaming, and a filler- block in the mag. is all it took.
I DO have to set my sights at 400yd. to shoot at 100, but the old girl speaks a lot more than she would otherwise.