There are so MANY variables that can determine a person's starting strength in weight lifting. It varies so much from one person to the next, that there really is no standard guideline. Body structure, tendon strength,mind muscle connection, are just a few. Aslong as you are pushing yourself hard, the results will come, and what you are lifting now is only temporary. 170 for 6-8 reps is alot stronger then I was after less then a year training, but it took me long since I started at around 105lbs bodyweight. Just KEEP KILLING THAT SHIT!!