Depends what I'm doing. For just a 3 x 8-12 I usually do around 90kg, For the last squat workout I did with 5 sets it was more like 2 x 15 warmups with just the bar 1 x 15 60kg 1 x 12 65kg 1 x 10 70kg 1 x 10 75kg 1 x 8 80kg 1 x 4 100kg <- Did that last set with someone spotting me just to completely kill my legs. I was trying to max deadlift today. I've only been doing deadlifts for a month or so, I was pretty happy to get over 2x my bodyweight out on this one, I know my forms not good, but it was [bleep]ing heavy. 160kg/352lbs