Yes, I would feel confident pulling the trigger on a broadside shot. Wouldn't knock it off its feet but dead is dead.
Would use a 170gr softnose FP that shot the most accurate at the highest vel. Hornady would be my first choice to try. Had very good success with their Interlock bullets.
Remember that the 30-30 has been dropping game large and small throughout N. America for the last 100yrs. Nothing much has changed. Just keep your range and your shot angles sensible.
Good luck...
Jerry