Can I hunt rabbits on public land in Illinois with a rifle?
I found this quote:
Q: Can I use a centerfire rifle for hunting in Illinois? Or handguns?
A: The following species may be taken with a rifle or handgun: coyote, striped skunk, woodchuck, squirrel, rabbit, raccoon, opossum and red and gray fox. We do not regulate the caliber of handgun or rifle that may be used, except on state-owned or managed areas, which normally allow only the use of shotguns or .22 caliber rimfire rifles.
https://www.dnr.illinois.gov/hunting/Documents/HuntTrapDigest.pdf