From the Ohio Hunting Regulations Webpage, new this year, the requirements for what consitutes a legal deer rifle:
Straight-walled cartridge rifles in the following calibers: New this year! All straight-walled cartridge calibers from a minimum of .357 to a maximum of .50. Shotguns and straight-walled cartridge rifles can be loaded with no more than three shells in the chamber and magazine combined.
Given those specs, what deer rifle would you choose?