anyone tried this?

I was talking with a friend of mine who trains with weights and has done so for the past ten years. He’s huge. He told me he gets best results (hypertrophy and strength)when he combines low and high rep sets for the same exercise in the same workout. For example doing 3 sets of 3 heavy reps on the bench press followed by 3 sets of 8-12 reps. Anyone here ever tried a program like this and why do you think it would (or would not) work? ANy benefits to doing this type of training. I apologize if this has been brought up before but I couldn’t find anything with the search engine.

you could read OVT by C.T.
it’s in the previous issues section.