I have tested several types of Fire line but with the same result. It brakes on a much lower rate then they say on the package but only when I tie it together with nylon!! I have tried to pull the knot hard or loose but it doesn’t matter. Bristol knot or Albrite has the same braking strength one 1/3 of the claimed strength? If you don’t believe me test it yourself with a scale! Each knot I have tested I have done at least 5 knots to make sure I don’t tie it wrong.