at your age yes it is a good accomplishment i wasnt benchin that til 20, BUT 1 piece of advice i will give you wich i do still give youngsters in the gym is DONT rush strength itll come over time, you dont need aditional stress on your joints at such a young age, so lift well and resposiblly and youll get stronger and stronger but lift heavy and stupidly youll see injuries at an early age!