Many, many moons ago, I was climbing a tree on the opening morning of deer season, with my rifle slung over my shoulder. It slid off, and I heard it banging against the limbs on the way down. I probably dropped it about 15 feet. Checked the zero later on that day, and it hadn't changed a bit.
By the way, the scope was a Tasco World Class, so, so much for Tasco always being junk.
