weighted dips are great for developing tricep power, but as for an amount of weight that is relative to your body weight and natural strength curve....I for example have benched a 405 raw single at 190lbs bodyweight, and have done dips for reps with 4 -45lbs plates around my waste....my training partner has hit 550 @ 280lbs bodyweight and cant do dips with much weight at all. Does this mean I have stronger tri's than him? NO, its just dips....just shoot for 10 rep sets ans slowly increase the weight, your bench will go up.