It can be long that zeroing in your firearms to ensure that they are as accurate as possible, and not to mention boring, process. Furthermore, you may have to fire a lot of bullets before you actually do zero in your gun. And considering the fact that ammo isn’t cheap, that process can take a lot money.
Choosing a firearm scope really depends on your needs. Whether you're a hunter or a target shooter, there are hundreds if not thousands of different scopes to choose from. The important thing to do is recognize what you actually need a scope for, and choose accordingly.