So I bought some more dumbbells up to 120, because of me pulling my right pec on barbell presses consistently, for those who don't know the story. What I am noticing, is my rep range is lower with the dumbbells? I am still happy with the weight I'm pushing, just find it odd I can't do as many reps with the dumbbells? Only thing I can think of is that the barbell is more stabilized so you don't have to balance the weight as much. This is only on bench pressing. Anyone have any thoughts. I tried the barbell just to see if I got weaker, but nope. I can still do more reps on the barbell.