Yep. V2.
I remember toying with those Speer plastic primer-only bullets for indoor practice with charges of BullEye and Unique. Don't remember their weight, but Miculek's comment sounds about right. Parallel results with plastic bottles of water.
But I hope he brought his cleaning rod or .38 BoreSnake along.
Terry, 230RN
I've got those Speer "Target .38" plastic cases and bullets too. From a 2" snubby with just the primer, they'll go through a stack of boxes and the drywall behind them, no joke.
I've found that stuffing disposable foam earplugs in them instead lets you do short range target shooting with a single cardboard box or a garbage bag full of paper as backstop at about 10 yards or less.
You could do force on force with them too, but the safety issues are always lurking, so I guess that's a no-go. Stick to Airsoft, or simunitions if you can afford it.
My club did a self-defense shooting clinic with Airsoft, and while it was amateur hour compared to a well known class, it was still illustrative as to how fast you can get shot, or how hard it is to shoot someone when you do have to shoot.