1. Ditch your dice and buy new ones, as there are known weighting issues with some dice. I doubt this is the issue, but it might be.
2. Get a small notebook and start recording every die roll in it. Dollars to donuts, over time you will observe a normal distribution of rolls.
2. Get a small notebook and start recording every die roll in it. Dollars to donuts, over time you will observe a normal distribution of rolls.