I love range pickup brass. Found a couple new shooting spots lately that have been gold mines. Gotten hundreds of 9mm and .223 lately, just loaded almost 300 rounds of .223 the other night with 'em. Lovin' that.
Shot alongside some strangers at one of the spots, told 'em to leave it when done, I'd pick it up. They were only too happy to oblige.
Reaming primer pockets is a pain, but when you see that crimp you know it's not someone's x-times loaded brass they're now chucking.
As always, inspect thoroughly, and when in doubt throw it out.