For most shoots, I take a dozen. For the Moses Lake Rock Shoot, I take at least two dozen. I'm getting to be a better shot. Last year I only lost two (one lost, one bent, actually)... But I'll still take 'em all... could have a bad day. 8^)
Out here, most of our trad shoots are pretty loose. You shoot all you want, whenever you want and over two or three days, I'll usually shoot at least six rounds, sometimes eight. My standard for a good shoot is if I can't wave my arms and can barely walk when it's done. Sure ain't gonna drive a ways, set up a camp and have any chance of running out.