From an email I received yesterday from DNR:
Important corrections to Indiana Hunting & Trapping Guide
Indiana deer and waterfowl hunters need to be aware of two important changes in the print version of the 2017-2018 Hunting & Trapping Guide.
Due to recent legislation passed this year by the Indiana General Assembly, hunters can no longer use rifles when hunting deer on public land. “Public land” includes both state and federal property. Before the change, the use of rifles on public land had been legal.
It remains legal to use a muzzleloader, shotgun or handgun when hunting deer on public land in accordance with deer hunting regulations.