This method will keep the muscle under tension at all times.
Well:

I am used to powerlifting methods, heavy ass weight, and locking out each rep, not getting the desired pump, or feeling.

Started of with HST yesterday, after about 1,5-2 years with the lockout stuff.

Went for 15 reps on everything, really felt amazing (especially chest, because there I am used to 5-8 reps)

I did not lock one single rep out, and just kept pumping away, it really burned.

Well the question is:

Is this more of a "bodybuilding" method. For pure muscle mass gain I mean?
Because I see everyone who is a bodybuilder do this, in the gym, and on films everywhere.