These guys were still getting 2630 fps from an 18" barrel with 168's
http://www.tacticaloperations.com/SWATbarrel/
2600-2700 fps from a 16" barrel and 150's should certanly be possible. That is a lot better than you can get from a 30-30. My 20" guns chrono about 2225, the 16" 30-30 about 2175.