I have slowly evolved through the years on what I take with me when I go shooting, whether that be at my local range or when I want to go out somewhere on my own and shoot. Very early on I discovered how much of a hassle it is to bring factory ammo boxes with you. They only hold 20 rounds, if it is wet at all the cardboard will disintegrate on you, and you have the left over trash that if you are not careful can blow away from you. My first stop was to put all my factory ammo in reloading boxes. This worked well as it allowed me to carry more ammo in 1 box, no trash to have to worry about, and they were durable. The major down side to reloading boxes was that they could be hard to pack in a backpack, they would rattle like crazy as you walked around, you have to have different boxes for different calibers. I came across these AEM Precision Ammo Pouches and knew that this was going to be my last stop. The craftsmanship is excellent. They can fit up to 40 rounds. If you only need 20 you can either buy a smaller option or just only load have of the 40 round ammo pouch. They can fit a wide variety of calibers so if you have different guns you can still load up the same pouch when you go out. They are durable and when fully loaded are easy to find a place for them to fit in range bags or backpacks. If you reload you can even push the empty brass back into the elastic to take home.
I plan on ordering a few more so that when I do rifle competitions I don't have to bring plastic boxes with me anymore.