Four hours, a couple of hundred rounds and two sunburns. We didn't take as much as we usually do, but still had a lot of fun. The .300 Win. Mag. does a number on half inch steel plate. It didn't go all the way through, but nearly did with a huge bulge on the other side. Magnus is holding a 7.62x39 up to the hole the .300 Win. Mag made. Impressive penetration.