Indiana is quite the joke... try to follow along, this is for deer...
Rifles for PUBLIC LAND: , must fire a bullet .357" or larger with a case measuring between 1.16" min. To max of 1.8"
Rifles for PRIVATE LAND: must fire bullet .243" or larger, minimum Case length 1.16" max of 3" and you CAN NOT have more than 10 rounds in your possession.
Handguns: (for public land OR private) must fire a bullet at least .243" or larger with a minimum case length of 1.16 with NO MAX length. (There is NO mention of ammunition allowed to be in possession with handgun)
"The handgun must not be a rifle that has a barrel less than 18 inches. A rifle with a barrel less than 18 inches is not considered a handgun."——
^^ this is direct from our regulation book. How does one even define this?
So to me, I built a 6.5 grendel with a 15 3/4" barrel and a .300 BO (10") for my public land deer guns, I usually draw a special "reduction" hunt. That's the only time I hunt "public land" per our rules I can literally use my .308 striker pistol or even build any handgun I want chamber it for something ridiculous, let's say .375CT with a 18" barrel and go hunt public land. But, I CAN NOT hunt with a 16" grendel or .300 BO. Common sense is all to uncommon.