I always wear safety glasses, learned the hard way!! A very good friend of mine started competition shooting with our group about 15 years ago. He wanted to get into reloading, so he bought a Lee Pro 1000. He loaded about 10 rounds, and had a detonation of a primer. It had a chain reaction up the primer chute, and blew the whole primer tray up, and the debris went all directions, including back at him. This guy wore corrective lenses, so having his glasses on saved his sight. His face and chest looked like he had been shot with a shotgun. The debris went right through his t shirt, and his glasses were damaged enough that the lenses had to be replaced. I used a pro 1000 at that time, too, and had never thought about eye protection ( I was young and dumb), but I went out and bought some safety glasses before I loaded again, and wear them ANY time I reload ( and shoot, too. The 22lr case that blew up in my face is another story, though).