Are you using factory ammo or reloading?
If reloading, are you using the 150 fusion specifically designed for 30-30 or the more pointy one? Google tells me the "regular" fusion bullets have a minimum velocity of 1900fps, which is probably on the high end of what you can expect at 200yds with those bullets in a 30-30. I suspect the 30-30 version of the bullet expands at lower velocities, although I can't confirm that.
The factory Federal Fusion 30-30 ammo is still holding 1800+fps and 1000+ft/lb energy at 200yds, assuming the bullet opens at those speeds that should be plenty to take down a deer.