Video: Reams of paper make for pretty good bullet proof material. It's just layers and layers of protection! But what happens when it's a 50 cal machine gun that's shooting at paper? How many reams does it take to stop that ridiculously giant and powerful bullet? About 7! Which is like, 3500 sheets of paper.
I'm going to build my post-apocalyptic home out of stacks of paper. Demolition Ranch, as only they can, showed us how paper stacks up against a 50 cal below.