We abused the hell out of the B&T 3d printed cans this weekend, the 556 cans got a little bit "discolored" but still took the punishment. During each cease fire we would pour water on them to cool them down a little bit.
I don't know how many rounds were sent down range this weekend, but just from today's shoot, I picked up just shy of two 5 gallon buckets of mixed 9mm, 300 Blk and 5.56 brass.