Indiana is one buck per year regardless of method. Does require a degree in advanced math to figure out how many you can take. Indiana use to be 1 buck archery and 1 buck gun. At the time most every bow hunter would take the 1st buck they saw knowing they still had gun season to get Mr Big (which rarely happened cause the bow hunters were slaying the 1.5 yr olds each year. Now after about 7 years of OBR (one buck rule) quality and age structure of the deer where I hunt is great. It is easy to pass up on what use to be a nice 1.5 yr old 8pt cause you know you are going to see a 120 class 3.5 yr old pretty soon.
We still have guys (kids exempt) that will still fire away at the 1st antlered deer they come across (usually in gun season).