Well, at some point, you have to stop and ask, if you even want to have any guns in the game at all. Why should I bother with a Single shot rifle, that reloads about as slow as a crossbow, is far more costly to operate and will attract zombies? Why on earth did ANYBODY at all in the history of the universe bother with firearms in the first place?
Also, the setting of 7dtd is seemingly an american one, yet in the country of more guns than people, where every other yankedoodle gets off on his 5 AR 15 rifles, and hunters pack more punch than a WWII army squad could hope for....
Why is the hunting rifle a single shot one, that even most conservative militaries abandoned in the second half of the 19th C?
I used to own a german Military rifle from the early 1880s, that actually really used an all lead bullet, and black powder (!) in brass shells, and it had a 8 shot magazine.
In my country, which is far FAR from being as gun laden as the US, pretty much all hunters at least have 5 shot rifles, many of the Mauser family of guns.
I also own a crossbow, and it is ridiculous how fast the crossbow is reloaded in this game.