Jedfordski

Hello all, My friends and I have just started a one shot Pulp Cthulhu adventure to ease us into the system, first game for all of us. I've created a Mystic with Telekinesis, but I'm struggling to understand how to use it as my primary attack. I was thinking of carrying large steel ballbearings that I could fire off. I've no idea what the damage would be though. What others ways could I use it? Cheers, Jed.