Weigand makes a small mount that I use on a 5" M29.
Was using it today, and shot a couple quick groups @100 yards using Idaho 1945s powder coated cast bullets.
This one went into 4"s
While adjusting the sights, had one "fluke" group sneak in there. Those are the kind that people claim they can do "all day"
Personally I am happy with 4"s at 100 yards. That will do for Muleys or elk or coyotes.