" I search the trash at the shooting range for empty boxes"
I used to do the same..had /have a large amount of brass in various calibers, started collecting ammo boxes & the Styrofoam /plastic round holders
so I could store the cases after they were loaded. had to stop doing this ,as I collected too many! Most shooters @ my club don't reload or save brass,
throw empties in the range brass bucket, or just leave it lying on the ground
Stopped picking up brass in 9mm, 380, 40, 223, & 308 as have more than I'll ever use. I used to buy plastic ammo storage boxes for my
loads until I realized I could re-use factory ammo boxes, after picking them up to "recycle"