Can I take my gun to the range in it's original case?

I just bought a Glock 19 and Im planning to go to the range with it this weekend. I know for handguns to transport they need to be unloaded in a locked container or in the trunk. But I read it has to be locked when you are walking with it to/from your car. So do I need to buy a locked case for my gun before I can go to the range? I'm planning to buy one regardless so I don't mind if I do I just need to know if i have to do it before I go.