Without a clear delineation of what is considered "big game", it was interesting to make that determination for myself and decide how I would vote. Even though there isn't any biological basis for it, I drew the line between a mule deer and a whitetail. The reason is personal to my situation, because I can hunt whitetails every single year, for multiple days per year, with an over the counter tag in my home state and adjacent states. Those hunts aren't unique or as much of a "big deal/big game" to me. By contrast, I'm 53 and I've hunted mule deer three times, elk once, moose once, aoudad once, black bear once. Those are "big deal/big game" to me because they are unique and special opportunities.
When I have lots of hunting opportunity like whitetails, I have no issue trying some variety or experimenting with guns and calibers. I have so many whitetail killing firearm devices, it's somewhat wasteful. LOL. 30-30, 6.5 CM, 450 BM, 45-70, 223, 30-06. I'm even adding an old Savage 99 in 300 Savage for nostalgia sake.
But, when I may only draw that tag or devote those resources to hunt something once or a few times in my entire life, I will get more conservative and traditional in my caliber choice. Seeing a lot of the "me and my friends have killed hundreds of (insert the big game animal here) with a small caliber" comments got me thinking about this as it relates to me. I respect those responses and experiences, but I won't ever have that body count or even opportunity count for mule deer/elk/moose/etc. So, for me personally, that difference influences my choice and how I voted.